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Information in this manual is subject to change without notice.
© 19941996 Dell Computer Corporation. All rights reserved.
Printed in the United States of America. Reproduction in any manner whatsoever without the written permission of Dell Computer Corporation is strictly forbidden. Trademarks used in this text: Dell, the DELL logo, and Latitude are registered trademarks of Dell Computer Corporation; MS-DOS is a registered trademark of Microsoft Corporation; Intel and Pentium are registered trademarks of Intel Corporation; IBM is a registered trademark of International Business Machines Corporation. Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products. Dell Computer Corporation disclaims any proprietary interest in trademarks and trade names other than its own. June 1996 P/N 98085
Contents
Chapter 1 System Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
System Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Physical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Status Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Keyboard Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 CD-ROM/Hard-Disk Drive Indicator . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Diskette-Drive Access Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 PC Card Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 AC Power Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 Battery Activity Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 Battery Status Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 Battery Charge Gauge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 System Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 Power Conservation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 Interrupt Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Chapter 2 Initial Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Initial User Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 Visual Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 Observing the Boot Routine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 Eliminating Resource Conflicts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5 Getting Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
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Chapter 3 Beep Codes and Error Messages . . . . . . . . . . . . . . . . . . 3-1
POST Beep Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 System Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 Running the Dell Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Chapter 4 Removing and Replacing Parts . . . . . . . . . . . . . . . . . . . 4-1
Recommended Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 Screw Identification and Tightening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 Precautionary Measures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3 ZIF Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6 Exploded Views of Components and Assemblies . . . . . . . . . . . . . . . . . . . . . 4-7 Factory Repair Parts and Assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11 Deleting the Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18 Hard-Disk Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19 Diskette Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20 CD-ROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21 Memory Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22 LCD Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23 Front Bezel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24 LCD Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25 Inverter Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26 Microphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26 LCD Assembly Latches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27 Power/Suspend Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-28 Back Bezel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-29 Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-30 Top Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32 Speakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-34 Status Display Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-35 I/R Device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-36 Power Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-37 Touch Pad. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-38 Bottom Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-39 Processor Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-40 Power Supply Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-41
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Audio Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-42 Main Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-43 Cache Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-45
Index Figures
Figure 1-1. Figure 1-2. Figure 1-3. Figure 4-1. Figure 4-2. Figure 4-3. Figure 4-4. Figure 4-5. Figure 4-6. Figure 4-7. Figure 4-8. Figure 4-9. Figure 4-10. Figure 4-11. Figure 4-12. Figure 4-13. Figure 4-14. Figure 4-15. Figure 4-16. Figure 4-17. Figure 4-18. Figure 4-19. Figure 4-20. Figure 4-21. Figure 4-22. Figure 4-23. Figure 4-24. Figure 4-25. Figure 4-26. Figure 4-27. Figure 4-28. Front View of the Portable Computer . . . . . . . . . . . . . . . . . . . 1-2 Back View of the Portable Computer . . . . . . . . . . . . . . . . . . . 1-2 Status Display Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Computer Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 Screw Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 Main Battery Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3 Hard-Disk Drive Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4 Options Bay Lock and Latch . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4 Diskette Drive, Secondary Battery, or CD-ROM Removal. . . 4-5 PC Card Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5 Releasing a ZIF Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6 Exploded View--Computer. . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7 Exploded View--LCD Assembly . . . . . . . . . . . . . . . . . . . . . . 4-8 Exploded View--Top Assembly . . . . . . . . . . . . . . . . . . . . . . . 4-9 Exploded View--Bottom Assembly . . . . . . . . . . . . . . . . . . . 4-10 Capacitor C146 (Location). . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18 Hard-Disk Drive Disassembly . . . . . . . . . . . . . . . . . . . . . . . . 4-19 Diskette Drive Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20 CD-ROM Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21 Memory Module Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22 LCD Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23 Front Bezel Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24 LCD Panel Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25 Inverter Board Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26 LCD Assembly Latches Removal . . . . . . . . . . . . . . . . . . . . . 4-27 Power/Suspend Indicator Removal . . . . . . . . . . . . . . . . . . . . 4-28 Back Bezel Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-29 Keyboard Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-30 Top Assembly Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32 Speakers Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-34 Status Display Board Removal . . . . . . . . . . . . . . . . . . . . . . . 4-35
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Figure 4-29. Figure 4-30. Figure 4-31. Figure 4-32. Figure 4-33. Figure 4-34. Figure 4-35. Figure 4-36. Figure 4-37.
I/R Device Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power Button Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Touch Pad Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bottom Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Processor Board Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . Power Supply Board Removal . . . . . . . . . . . . . . . . . . . . . . . Audio Board Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Main Board Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cache Board Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-36 4-37 4-38 4-39 4-40 4-41 4-42 4-43 4-45
Tables
Table 1-1. Table 1-2. Table 3-1. Table 3-2. Table 4-1. Table 4-2. Interrupt Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 POST Beep Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 System Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 Factory Repair Parts and Assemblies . . . . . . . . . . . . . . . . . . 4-11 Naming Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
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Read This First
A prerequisite for using this manual to service Dell portable computers is a basic knowledge of IBM-compatible PCs and prior training in IBM-compatible PC troubleshooting techniques. In addition to information provided in this manual, Dell provides the Reference and Troubleshooting Guide for troubleshooting procedures and instructions on using the Dell diagnostics to test portable computers, and the online System User's Guide for information about system setup and operations.
Warnings, Cautions, and Notes
Throughout this manual, there may be blocks of text printed in bold type or in italic type. These blocks are warnings, cautions, and notes, and they are used as follows:
WARNING: A WARNING indicates the potential for bodily harm and provides instructions for how to avoid the problem. CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and provides instructions for how to avoid the problem.
NOTE: A NOTE provides helpful information about using the computer system.
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Chapter 1
System Overview The Dell
Latitude® LM P-100SD and LM P-133ST are high-performance multimedia portable computers that use the Intel® Pentium® microprocessor. This chapter provides an overview of the components and subsystems of these computers. The individual model names within the Dell Latitude LM portable family indicate the type and operating frequency of the microprocessor and display used in the computer. For example:
®
· The Dell Latitude LM P-100SD contains a 100-MHz Pentium microprocessor and an SVGA (S) dual-scan (D) STN LCD.
· The Dell Latitude LM P-133ST contains a 133-MHz Pentium microprocessor and an SVGA (S) active-matrix (T) TFT LCD.
System Features
In addition to the standard features found in IBM®-compatible portable computers, the Dell Latitude LM includes the following new and/or advanced features:
· 8 MB of nonremovable main memory on the main board. The memory
capacity can be increased up to 40 MB by installing a matched pair of 4-, 8-, or 16-MB memory modules in the memory upgrade sockets on the main board.
· An 11.3-inch dual-scan SVGA color display or a 12.1-inch active-matrix
SVGA display.
· 42-WH lithium ion battery (nine cells). · 256-KB SRAM level-2 external cache and 16-KB internal cache. · NeoMagic 2070 video controller supporting all video features with a PCI
local bus.
· Intel 430MX PCIset for system and PCI controller. · Built-in microphone and jacks for connecting external speakers, microphones, and headphones.
· Two new diagnostics tests (infrared and audio). · An options bay that lets users replace the secondary lithium ion battery or
diskette drive without turning off or rebooting the computer. This feature is sometimes called hot swapping. The CD-ROM can be inserted or removed while the computer is in suspend mode. This feature is sometimes called
System Overview
1-1
warm swapping. However, the CD-ROM must be in the computer before or during boot in order for the drivers to load.
· Built-in serial infrared transmitter/receiver, effective to 1 m (3.3 ft). · Support for connecting an external diskette drive to the parallel connector
on the I/O panel.
Physical Description
LCD assembly status display panel latch (2) keyboard microphone hard-disk drive bay power button power/suspend indicator
touch pad button (2) touch pad
display close button options bay main-battery compartment
Figure 1-1. Front View of the Portable Computer
infrared port serial port connector parallel port connector monitor connector I/O panel service tag number expansion connector PS/2 connector external microphone connector AC adapter connector PC Card slots headphones/speakers connector
Figure 1-2. Back View of the Portable Computer
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Dell Latitude LM Systems Service Manual
Status Display
.
Figure 1-3. Status Display Panel
The status display panel is located directly above the keyboard. This panel shows icons that indicate keyboard operation or suspend mode; CD-ROM, hard-disk drive, diskette drive, and PC Card activity; and status of the power source (AC power or batteries).
Keyboard Indicators
The following icons indicate the status of the keyboard and whether the computer is in suspend mode. Caps Lock Indicator Press to activate this feature. Press again to deactivate the feature. Num Lock Indicator Press to activate this feature. Press again to deactivate this feature. Pad Lock Indicator This indicator appears when the embedded keypad is active. To activate the embedded numeric keypad, press . Press to toggle between the cursor keys and number keys. Scroll Lock Indicator Press to activate this feature. Press again to deactivate this feature. Suspend Mode When all indicators are present and appear to be rolling the computer is in suspend mode.
CD-ROM/Hard-Disk Drive Indicator
This indicator blinks when data is being transferred to or from the CD-ROM or hard-disk drive.
System Overview
1-3
Diskette-Drive Access Indicator
This indicator blinks when data is being transferred to or from the internal diskette drive.
PC Card Indicator
This indicator blinks when the computer is accessing data from an installed PC Card or Cards.
AC Power Indicator
This indicator appears when the computer is receiving power through an AC power adapter.
· ·
If the icon is present but not blinking, the computer is on but the battery is not charging. If the icon is blinking, the computer is on and the battery is charging.
Battery Activity Indicator
This indicator appears when there are batteries in the computer. If the main battery is present, the upper triangle appears. If the secondary battery is present, the lower triangle appears. If either triangle is blinking, the battery is in use or charging.
Battery Status Indicator
The battery status indicator reflects the state of the main or secondary battery in the computer when the computer is off. No indicator means there is no battery (main or secondary) in the computer or, if present, the battery has been discharged.
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Dell Latitude LM Systems Service Manual
· The AC power indicator with the battery status indicator means the battery is defective.
· An indicator with one bar on the left means a battery is
too hot. Allow the battery to cool to room temperature.
· The AC power indicator with the battery status indicator and one bar means that the battery is too hot (40° C [104° F] or more) to start charging. Charging starts automatically when the battery cools to below 40° C.
· An indicator with no bars means that battery power is
low (about 80 percent depleted). This is the first lowbattery indication and the computer warns the user with three short, audible beeps. There are about 20 minutes of battery life remaining.
· A blinking indicator with no bars means that battery
power is critically low (about 95 percent depleted) and needs recharging. There are about 5 minutes of battery life remaining.
· An indicator with bars on the right side of the icon
indicates the percentage of battery life remaining. Each bar equals 10 percent of battery life.
Battery Charge Gauge
There is a battery charge gauge on the main and secondary battery. When you press the battery test button (labeled "PUSH"), the appropriate indicator lights up for a few seconds to indicate the amount of charge remaining in the battery.
Password
CAUTION: Dell strongly recommends that the user back up the password onto a diskette. If the user forgets the password and does not have it on diskette, the computer cannot be accessed. In that case, the computer must be returned to Dell at the user's expense. Dell technicians will erase the password by shorting C146, recharge the CMOS battery, and send the computer back at the user's expense. For the procedure to erase the password, see "Deleting the Password" in Chapter 4.
System Overview
1-5
System Power
The power button controls power to the system. The computer receives power from either the AC adapter connected to an AC power source or from up to two batteries. If you use the AC adapter, constant power is available to the computer. If you use one or two batteries, the system has built-in power management features that extend battery life by removing power from parts of the computer that are not being used.
Power Conservation
Attach the AC power adapter to the computer, whenever possible, to conserve battery power. When the AC adapter is attached, the battery is charged while the computer uses AC power. The Power Menu of the Setup program has power conservation features. When activated, each power conservation feature turns off or slows down one or more functions while the computer is idle. The power conservation features are as follows:
· Standby mode -- To activate this feature, select the STANDBY TIME-OUT
option in the Power Menu of the Setup program. To deactivate the feature, move the cursor or press any key on the built-in or external keyboard.
· Suspend mode -- To activate this feature, press or set the
SUSPEND TIME-OUT option in the Power Menu of the Setup program. When sus-
pend mode is activated, the computer beeps once and the suspend mode indicator in the status display panel blinks every 4 seconds. To deactivate this feature, press any key on the built-in keyboard. NOTE: To conserve power when the computer is not in use, close the display. If the display is closed and an external monitor is not connected, the computer beeps one time and goes into suspend mode. If the computer receives a modem call from an external modem while the display is closed, the computer answers the call unless it is in suspend-to-disk mode. To resume work, open the display.
· Suspend-to-disk mode -- To activate this feature, press or set the
SUSPEND TO DISK TIME-OUT option in the Power Menu of the Setup program. To
resume using the computer, press the power button on the built-in keyboard.
· Dimming the display -- To activate this feature, set the DIM MODE TIME-OUT
option in the Power Menu of the Setup program. To increase the brightness of the display, press any key on the built-in keyboard.
· Turning off the hard-disk drive -- To activate this feature, set the HARD-DISK
TIME-OUT option in the Power Menu of the Setup program. The computer automati-
cally turns the hard-disk drive back on the next time the microprocessor accesses the drive.
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Interrupt Assignments
Table 1-1. Interrupt Assignments
IRQ Line Used/Available
IRQ0 IRQ1 IRQ2 IRQ3 IRQ4 IRQ5 IRQ6 IRQ7 IRQ8 IRQ9 IRQ10 IRQ11 IRQ12
Generated by the system timer Generated by the keyboard controller to signal that the keyboard output buffer is full Cascade to second interrupt controller Used by the infrared port (COM2) Used by the serial port (COM1) Used by the audio controller Generated by the diskette drive controller to indicate that the diskette drive requires the attention of the microprocessor Used by the parallel port Generated by the system RTC Software redirect to INTOA Reserved Reserved Generated by the keyboard controller to indicate that the output buffer of the integrated touch pad or external PS/2 mouse is full Used by the math coprocessor on the microprocessor Generated by the hard-disk drive to indicate that the drive requires the attention of the microprocessor Reserved
IRQ13 IRQ14 IRQ15
System Overview
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Technical Specifications
Table 1-2. Technical Specifications
Microprocessor
Microprocessor type . . . . . . . . Intel Pentium microprocessor Microprocessor speed. . . . . . . 100 or 133 MHz Internal cache memory . . . . . . 16 KB External cache . . . . . . . . . . . . 256 KB Math coprocessor . . . . . . . . . . internal to the microprocessor
Chip Set and Bus
System chip set. . . . . . . . . . . . Intel 430MX PCIset Data bus width . . . . . . . . . . . . 64 bits DRAM bus width . . . . . . . . . . 64 bits Address bus width . . . . . . . . . 32 bits Flash EPROM. . . . . . . . . . . . . 2 Mbits
PC Card
PC Card connectors . . . . . . . . two (for two type I or type II cards or one type III card) Cards supported . . . . . . . . . . . 3.3- and 5-V PC Card connector size . . . . . 68 pins Data width (maximum) . . . . . 32 bits
Memory
Architecture . . . . . . . . . . . . . . fast-page mode, two-way interleaved Memory module capacities . . 4, 8, and 16 MB; must be installed in matched pairs Standard RAM . . . . . . . . . . . . 8 MB on system board Maximum RAM . . . . . . . . . . . 40 MB
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Dell Latitude LM Systems Service Manual
Table 1-2. Technical Specifications (Continued)
Memory (Continued)
Memory access time: tRAC . . . . . . . . . . . . . . . . 70 ns tCAC . . . . . . . . . . . . . . . . 20 ns BIOS address . . . . . . . . . . . . . F000:0000
Connectors
Serial (DTE) . . . . . . . . . . . . . . one 9-pin connector; 16,550-compatible, 16-byte buffer Parallel . . . . . . . . . . . . . . . . . . one 25-hole connector; unidirectional, bidirectional, EPP 1.9, or ECP Monitor . . . . . . . . . . . . . . . . . . one 15-hole connector PS/2 keyboard/mouse . . . . . . . one 6-pin mini-DIN Infrared . . . . . . . . . . . . . . . . . . one IrDA 1.0-compliant window Audio . . . . . . . . . . . . . . . . . . . microphone; headphones/speaker
Audio
Audio type. . . . . . . . . . . . . . . . SoundBlasterPro-compatible voice and music functions Audio controller . . . . . . . . . . . ESS 1688 Conversion . . . . . . . . . . . . . . . 16 bit (stereo analog-to-digital and digital-to-analog) FM music synthesizer . . . . . . . 20-voice, 72-operator Interfaces: Internal . . . . . . . . . . . . . . . ISA bus External . . . . . . . . . . . . . . . microphone (minijack); headphones/speaker (minijack) Internal speaker amplifier . . . . 0.5 W stereo Controls. . . . . . . . . . . . . . . . . . volume can be controlled through key combinations and software application menus
System Overview
1-9
Table 1-2. Technical Specifications (Continued)
Video
Video type. . . . . . . . . . . . . . . . 64-bit (128-bit hardware accelerated) PCI Video controller . . . . . . . . . . . NeoMagic 2070 Video memory . . . . . . . . . . . . 896 KB
Active-Matrix Display
Type . . . . . . . . . . . . . . . . . . . . active-matrix color (TFT) Dimensions: Height . . . . . . . . . . . . . . . 184.5 mm (7.3 inches) Width . . . . . . . . . . . . . . . . 246.0 mm (9.7 inches) Diagonal . . . . . . . . . . . . . . 307.5 mm (12.1 inches) Maximum resolution . . . . . . . 800 x 600 pixels; 256 colors Refresh rate (typical) . . . . . . . 70 Hz Response time (typical) . . . . . 60 ms Operating angle . . . . . . . . . . . 0° (closed) to 135° Dot pitch . . . . . . . . . . . . . . . . . 0.31 mm Power consumption . . . . . . . . 2.35 W Controls . . . . . . . . . . . . . . . . . brightness can be controlled through key combinations
Dual-Scan Display
Type . . . . . . . . . . . . . . . . . . . . dual-scan color (STN) Dimensions: Height . . . . . . . . . . . . . . . 172.8 mm (6.8 inches) Width . . . . . . . . . . . . . . . . 230.4 mm (9.1 inches) Diagonal . . . . . . . . . . . . . . 287.0 mm (11.3 inches) Maximum resolution . . . . . . . 800 x 600 pixels; 256 colors Refresh rate (typical) . . . . . . . 70 Hz Response time (typical) . . . . . 300 ms Operating angle . . . . . . . . . . . 0° (closed) to 135°
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Table 1-2. Technical Specifications (Continued)
Dual-Scan Display (Continued)
Dot pitch . . . . . . . . . . . . . . . . . 0.29 mm Power consumption. . . . . . . . . 3.4 W Controls. . . . . . . . . . . . . . . . . . brightness and contrast can be controlled through key combinations
Keyboard
Number of keys. . . . . . . . . . . . 87 (U.S. and Canada); 88 (Europe); 89 (Japan) Key travel . . . . . . . . . . . . . . . . 3.0 ± 0.5 mm (0.12 ± 0.02 inch) Key spacing. . . . . . . . . . . . . . . 19.1 mm (0.75 inch) Layout . . . . . . . . . . . . . . . . . . . QWERTY/AZERTY/Kanji
Touch Pad
Interface . . . . . . . . . . . . . . . . . PS/2-compatible X/Y position resolutions . . . . . 20 points/mm (500 points/inch) Size: Thickness . . . . . . . . . . . . . 4.65 mm (0.18 inch) at highest component Width . . . . . . . . . . . . . . . . 62.1-mm (2.4-inch) sensor-active area Height . . . . . . . . . . . . . . . . 49.0-mm (1.9-inch) rectangle with 0.5-mm (0.02-inch) tabs Weight . . . . . . . . . . . . . . . . 15 g (0.52 ounce) ± 0.5 g (0.001 ounce) Power: Supply voltage . . . . . . . . . 5 V ± 10% Supply current. . . . . . . . . . 4 mA (maximum operating current)
System Overview
1-11
Table 1-2. Technical Specifications (Continued)
Main Battery
Type . . . . . . . . . . . . . . . . . . . . lithium ion Dimensions: Height . . . . . . . . . . . . . . . . 22.0 mm (0.86 inch) Depth . . . . . . . . . . . . . . . . 219.0 mm (8.62 inches) Width . . . . . . . . . . . . . . . . 57.8 mm (2.27 inches) Weight. . . . . . . . . . . . . . . . . . . 0.44 kg (0.97 lb) Voltage . . . . . . . . . . . . . . . . . . 10.8 VDC Capacity . . . . . . . . . . . . . . . . . 42 WH Charge time (approximate):1 Computer on . . . . . . . . . . . 4 hours Computer off . . . . . . . . . . 3 hours Operating time (approximate, with no power management features enabled):1 . . . . . . . . . 3 to 5 hours with one battery; 6 to 10 hours with two batteries Life span (approximate)1 . . . . 500 discharge/charge cycles Temperature range: Charge . . . . . . . . . . . . . . . 0° to 40°C (32° to 104°F) Discharge . . . . . . . . . . . . . 0° to 60°C (32° to 140°F) Storage . . . . . . . . . . . . . . . -20° to 50°C (-4° to 122°F)
1
Battery performance features such as charge time, operating time, and life span can vary according to the conditions under which the computer and battery are used.
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Table 1-2. Technical Specifications (Continued)
AC Adapter
Input voltage . . . . . . . . . . . . . . 90 to 264 VAC Input current (maximum) . . . . 1.0 A at 100 VAC, full load Input frequency . . . . . . . . . . . . 47 to 63 Hz Output current . . . . . . . . . . . . . 2.6 A (continuous) Output power . . . . . . . . . . . . . 34 W Rated output voltage . . . . . . . . 16.2 VDC Physical: Height . . . . . . . . . . . . . . . . 27.0 mm (1.06 inches) Width. . . . . . . . . . . . . . . . . 60.0 mm (2.36 inches) Depth. . . . . . . . . . . . . . . . . 107.5 mm (4.23 inches) Weight (with cables) . . . . 0.3 kg (0.66 lb) Temperature range: Operating . . . . . . . . . . . . . 5° to 35°C (41° to 95°F) Storage . . . . . . . . . . . . . . . -20° to 50°C (-4° to 122°F)
Physical (Computer)
Height . . . . . . . . . . . . . . . . . . . 49.5 mm (1.95 inches) Width. . . . . . . . . . . . . . . . . . . . 299.9 mm (11.8 inches) Depth. . . . . . . . . . . . . . . . . . . . 228.7 mm (8.93 inches) Weight (with hard-disk drive, diskette drive, battery, and two PC Card blanks): Dell Latitude LM P100SD . . . . . . . . . . . Dell Latitude LM P133ST. . . . . . . . . . . . 3.1 kg (6.9 lb)
3.1 kg (6.9 lb)
System Overview
1-13
Table 1-2. Technical Specifications (Continued)
Environmental (Computer)
Temperature: Operating . . . . . . . . . . . . . 5° to 35°C (41° to 95°F) Storage . . . . . . . . . . . . . . . -20° to 50°C (-4° to 122°F) Relative humidity . . . . . . . . . . 10% to 90% (noncondensing) Maximum vibration: Operating . . . . . . . . . . . . . 0.51 GRMS using a random-vibration spectrum that simulates air shipment Storage . . . . . . . . . . . . . . . 1.1 GRMS using a random-vibration spectrum that simulates truck shipment Maximum shock:2 Operating . . . . . . . . . . . . . 1.52 m/sec (4.98 ft/sec) (less than or equal to a pulse width of 2 ms) Storage . . . . . . . . . . . . . . . 2.03 m/sec (6.66 ft/sec) (less than or equal to a pulse width of 2 ms) Altitude: Operating . . . . . . . . . . . . . 0 m to 2438 m (0 ft to 8,000 ft) Storage . . . . . . . . . . . . . . . 0 m to 12,192 m (0 ft to 40,000 ft)
2
Measured with the hard-disk drive in head-parked position.
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Chapter 2
Initial Procedures T
his chapter describes initial procedures that can help you diagnose a computer problem. These procedures can often reveal the source of a problem or indicate the correct starting point for troubleshooting the computer. Dell recommends that you perform these initial procedures in the order they are presented.
Initial User Contact
When you first contact a user who has a problem, ask the user to describe the problem and the conditions under which it occurs. A verbal description can often indicate the cause of a problem or indicate the appropriate troubleshooting procedure to use. After the user describes the problem, follow these steps: 1. Ask the user to back up any data on the hard-disk drive if the computer's condition permits. See the "Maintaining Your Computer" section of the online System's User's Guide. 2. Ask the user to try to duplicate the problem by repeating the operations he or she was performing at the time the problem occurred. Can the user duplicate the problem? Yes. Proceed to step 3. No. Proceed to the next section, "Visual Inspection." 3. Observe the user to determine whether he or she is making an error, such as typing an incorrect key combination or entering a command incorrectly. Is the problem a result of user error? Yes. Instruct the user in the proper procedure or direct him or her to the appropriate user documentation for a description of the correct procedure. No. Proceed to the next section, "Visual Inspection."
Visual Inspection
The visual inspection consists of a quick inspection of the exterior of the computer and any attached peripherals, including making any necessary corrections. For information about the proper removal and installation of computer
Initial Procedures
2-1
components, as instructed in the following procedure, see Chapter 4, "Removing and Replacing Parts." CAUTION: Before you proceed with the visual inspection, ensure that the user has saved all open files and exited all open application programs if possible. To perform a visual inspection, follow these steps: 1. Determine the power state of the computer. If the display is on, go to step 2. If the display is off, press any key to verify that the computer is not in suspend or standby mode. Then proceed to step 2. 2. Turn off any attached peripherals, and then turn off the computer. Then proceed to step 3. 3. Verify that the exterior of the computer is free of any obvious physical damage. 4. If the computer is operating from an AC adapter, verify the following: a. The AC adapter's AC power cable is connected to both the AC adapter and the wall outlet. The AC adapter's LED should be on. b. The AC adapter's DC power cable is properly connected to the computer's AC adapter connector. c. The AC adapter and cables are free of any obvious physical damage. 5. If the computer is operating from battery power, remove any installed batteries, verify that they are free of any obvious physical damage, and then reinsert the batteries into their respective compartments. Press the test button located on each battery to see if there is a charge. 6. Remove the diskette drive (if installed), verify that it is free of any obvious physical damage, and then reinsert the drive into its compartment. 7. Remove any installed PC Cards from the PC card slot, verify that they are free of any obvious physical damage, and then reinsert the card(s) into the PC card slot. 8. If there is a memory area problem and the computer has memory modules, remove the memory modules from the main board, verify that they are free of any obvious physical damage, and then reinstall the modules. 9. Open the computer, and verify that it is free of any obvious physical damage. 10. Verify that the keyboard is free of any obvious physical damage and that its keys operate freely. 11. Verify that the touch pad and its associated buttons operate freely.
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12. If an external monitor is connected, verify the following: a. The monitor's interface cable is properly attached to the externalmonitor connector on the computer's I/O panel. b. The monitor's power cable is attached to a power source and is free of any obvious physical damage. c. The monitor and its interface cable are free of any obvious physical damage. d. The monitor's controls are set according to the instructions in the documentation for the monitor. 13. If an external mouse is connected, verify the following: a. The mouse is properly connected to the keyboard/keypad/mouse connector on the computer's I/O panel. b. The mouse and its cable are free of any obvious physical damage. c. The mouse's ball and pushbuttons operate freely. 14. For any attached serial or parallel devices, verify the following: a. The device's interface cable connector is correctly attached to the appropriate port connector on the computer's I/O panel. b. The captive screws that secure the connectors at each end of the interface cable are secure enough to ensure a firm connection. c. The attached device and its interface cable are free of any obvious physical damage. 15. Turn on any attached peripherals and then the computer. Does the problem recur? Yes. Proceed to the next section, "Observing the Boot Routine." No. No further steps are necessary.
Observing the Boot Routine
After you perform a visual inspection as described in the previous section, boot the computer from a diagnostics diskette and, while the boot routine is running, observe the computer for any indications of problems. NOTE: To prevent possible damage to the original diagnostics diskette, always use a backup copy of the diagnostics diskette when servicing a user's computer. Dell recommends that users make copies of the Dell Diagnostics Diskette. For instructions, see "Before You Start Testing" in Chapter 4 of the Dell Latitude LM Reference and Troubleshooting Guide. To observe the boot routine, follow these steps: 1. Turn off the computer and any attached peripherals. 2. Insert a diagnostics diskette into the diskette drive. Turn on all peripherals and then the computer.
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3. Watch the indicators at the top of the keyboard. Depending on how your computer is configured, after various indicators flash momentarily in the status display panel, some indicators should light up and remain on. Do these indicators light up within seconds after the boot routine starts? Yes. Proceed to step 4. No. Troubleshoot the power subsystem. 4. While the boot routine is running, observe the computer for any of the following:
· Diskette-drive and hard-disk drive access indicator activity
These indicators light in response to data being transferred to or from the drives. If either of these indicators fails to light during the boot routine, troubleshoot the diskette drive or hard-disk drive subsystem, as appropriate.
· System error messages
These messages can indicate problems or provide status information. If a system error message is displayed, refer to Table 3-2.
· Beep codes
A beep code is a series of beeps that indicates an error condition. If the computer emits a beep code, refer to Table 3-1. NOTE: The computer beeps once shortly after the system boots. This beep is normal and not part of a beep code.
· Any unusual sounds
5. Observe the display for the Diagnostics Menu of the Dell diagnostics. Does the Diagnostics Menu appear on the display? Yes. See "Running the Dell Diagnostics" in Chapter 3. No. Proceed to step 6. 6. Insert another copy of the diagnostics diskette into the diskette drive, and reboot the computer. Does the Diagnostics Menu appear on the display? Yes. See "Running the Dell Diagnostics" in Chapter 3. No. Proceed to the next section, "Eliminating Resource Conflicts."
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Eliminating Resource Conflicts
Devices within or connected to the computer may require dedicated memory spaces, interrupt levels, and/or DMA channels. Because different devices can be configured at different times, it is possible the same resource is assigned to two or more devices. Disconnect all peripherals and remove all PC Cards to make sure that the computer failure is not caused by faulty devices. If you suspect that resource conflicts might exist, check the computer and reassign the resources as necessary. For more information about resolving conflicts, see Chapter 3, "Troubleshooting Your Computer," in the Reference and Troubleshooting Guide.
Getting Help
If none of the procedures in this chapter reveal the source of the problem or lead to the proper troubleshooting steps for determining the source of the problem, contact Dell for technical assistance. For instructions, see Chapter 5, "Getting Help," in the Reference and Troubleshooting Guide or the "Contacting Dell" section of the online System User's Guide.
Initial Procedures
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Chapter 3
Beep Codes and Error Messages T
his chapter describes beep codes and system error messages that can occur during system start-up or, in the case of some failures, during normal computer operation. The tables in this chapter list faults that can cause a beep code or system error message to occur and the probable causes of the fault in each case. If a faulty computer does not emit beep codes or display system error messages to indicate a failure, you should load the diagnostics and run the appropriate tests to help isolate the source of the problem. See "Running the Dell Diagnostics" found later in this chapter.
POST Beep Codes
If the display cannot display error messages during POST, the computer may emit a series of beeps that identify the problem or that can help you identify a faulty component or assembly. The following table lists the beep codes that may be generated during POST. Most beep codes indicate a fatal error that requires replacement of the main board or other corrective actions before the computer can operate.
Beep Codes and Error Messages
3-1
Table 3-1. POST Beep Codes
Beep Code Error Probable Causes
1-2 1-2-2-3 1-3-1-1 1-3-1-3 1-3-4-1 1-3-4-3
Memory module not being properly identified or used ROM BIOS checksum failure DRAM refresh failure Keyboard controller test failure RAM failure on address line nnnn RAM failure on data bits nnnn of high byte on memory bus RAM failure on data bits nnnn of low byte on memory bus Check ROM copyright notice failure Interrupt mask register failure
Faulty memory module or faulty main board Faulty main board Faulty main board Faulty keyboard or faulty main board Faulty memory module or faulty main board Faulty memory module or faulty main board Faulty memory module or faulty main board Faulty main board Faulty main board
1-4-1-1
2-1-2-3 2-2-3-1
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System Error Messages
The following table lists (in alphabetical order) system error messages that may appear on the display during the boot routine or during normal computer operation.
Table 3-2. System Error Messages
Message Definition Probable Causes
Diskette drive A error
Connector loose or diskette faulty.
Faulty or incorrectly inserted diskette in drive. Faulty diskette drive. Faulty main board. Faulty or improperly seated memory module. Faulty main board. Faulty or improperly seated memory module. Faulty main board. Corrupted hard-disk drive boot sector or configuration file. Faulty hard-disk drive. Faulty main board. Faulty hard-disk drive. Faulty main board.
Extended RAM failed at offset: nnnn Failing bits: nnnn Fixed disk 0 failure
Extended memory not configured properly or failed at memory address nnnn. Memory failed at RAM address nnnn. Hard-disk drive not responding to commands from computer. Hard-disk drive or controller not responding to commands from computer. Diskette drive not identified properly in the Setup program.
Fixed disk controller failure
Incorrect drive A type--run Setup
Incorrect drive configuration. Faulty connections. Faulty diskette drive. Faulty main board. Faulty keyboard connection. Faulty keyboard. Faulty main board.
Keyboard controller error
Keyboard controller faulty.
Beep Codes and Error Messages
3-3
Table 3-2. System Error Messages (Continued)
Message Definition Probable Causes
Keyboard error
Keyboard not responding correctly.
Built-in keyboard: Faulty keyboard or key pressed while computer booting. External keyboard: Cable or connector loose. Faulty keyboard or key pressed while computer booting. Incorrect drive configuration. Operating system not installed on hard-disk drive or diskette drive not bootable. Faulty connections. Faulty drive. Faulty main board. Faulty main board. Faulty main board. Faulty battery. Faulty main board. Faulty or improperly seated memory module. Faulty main board. Faulty CMOS battery or main board. Faulty microprocessor.
Operating system not found
Operating system cannot be found on harddisk drive or on diskette in diskette drive.
Parity check 1 nnnn Parity check 2 nnnn Real time clock error Shadow RAM failed at offset: nnnn System battery is dead--Replace and run Setup System cache error--cache disabled
Parity error in system bus at address nnnn. Parity error in I/O bus at address nnnn. CMOS battery that supports data stored in NVRAM may be dead. Shadow RAM failed at address nnnn. CMOS battery dead.
Primary cache failed.
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Table 3-2. System Error Messages (Continued)
Message Definition Probable Causes
System CMOS checksum bad--run Setup
CMOS has been corrupted or modified, possibly by an application program that changes data stored in CMOS. Memory not operating correctly. System RAM failed at address nnnn in the 64-KB block at which error was detected. Timer circuit on main board malfunctioning.
BIOS has been updated.
System RAM failed at offset: nnnn
Faulty or improperly seated memory module. Faulty main board.
System timer error
Faulty main board.
Beep Codes and Error Messages
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Running the Dell Diagnostics
CAUTION: To prevent damage to the original diagnostics diskette, always use a backup copy of the diagnostics diskette when servicing a user's computer. Dell recommends that users make several copies of this diskette to ensure that one is always available. The Dell diagnostics contains tests that aid in troubleshooting the computer. The diagnostics diskette contains the following test groups:
· · · · · · · · · · · ·
RAM -- Tests the main memory System Set -- Tests the primary functions of the main board Video -- Tests the video subsystem Keyboard -- Tests the keyboard subsystem Mouse -- Tests the mouse/touch pad subsystem Diskette Drives -- Tests the diskette drive subsystem Hard-Disk Drives (Non-SCSI) -- Tests the IDE hard-disk drive subsystem IDE CD ROM Drives -- Tests a CD-ROM drive subsystem Serial/Infrared Ports -- Tests the serial communications port Parallel Ports -- Tests the parallel communications port Audio -- Tests the operation of the audio chip set SCSI Devices -- Tests a SCSI hard-disk drive subsystem NOTE: This test does not apply to Dell Latitude LM computers.
· Network Interface -- Tests a network controller and its associated interface
NOTE: This test does not apply to Dell Latitude LM computers. To start the diagnostics, turn off the computer, insert a diagnostics diskette into the diskette drive, and then turn on the computer. Starting the diagnostics causes the Dell logo screen to appear, followed by a message indicating that the diagnostics is loading. Before the diagnostics loads, a program tests the portion of main memory (RAM) required for loading the diagnostics. If a main memory error is detected, a message appears on the screen telling you a memory module has failed. If no errors are found in main memory, the diagnostics loads, and the Diagnostics Menu appears. This menu lets you choose the following options or exit to the MS-DOS® prompt:
· · ·
Runs preselected tests to quickly locate a computer failure or to indicate where further testing is needed to isolate a failure
RUN ALL TESTS
RUN QUICK TESTS --
-- Runs all tests for a thorough test of the computer Tests a particular area or subsystem of the
RUN SPECIFIC TESTS --
computer
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Chapter 4
Removing and Replacing Parts T
his chapter provides procedures for removing and replacing components, assemblies, and subassemblies. Unless otherwise noted, each of the procedures in this chapter assumes the following:
· The computer and any attached peripherals are turned off and the peripherals disconnected from the computer's I/O panel.
· A part can be replaced or installed by performing the removal procedure in
reverse order. When performing the procedures in this chapter that require the display assembly to be open, use a book or something similar to support the display assembly. The angle of the display assembly with respect to the bottom case should not exceed 135 degrees. Also, assume that locations or directions relative to the computer are as shown in Figure 4-1 unless otherwise specified in a procedure.
back of computer
left side
right side
front of computer
Figure 4-1. Computer Orientation
Recommended Tools
Most of the procedures require the use of one or more of the following tools:
· · · ·
Small flat-blade screwdriver Number 1 magnetized Phillips-head screwdriver Antistatic grounding strap Needle-nose pliers
Removing and Replacing Parts
4-1
· Small scribe (or Delrin [plastic] screwdriver) · Nut drivers · Chip removal tool
Screw Identification and Tightening
.
B7
(screw B7 is 3 mm)
3 mm
Figure 4-2. Screw Identification
CAUTION: It is essential that the correct length screw be used when reinstalling a screw. Otherwise, hardware damage could result. Make sure that the screw is properly aligned with its corresponding hole, and avoid overtightening. Where applicable, information about screw lengths is provided in illustrations. Before installing a screw, match the screw to the screw length graphics provided to check for correct length.
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Precautionary Measures
Before performing any of the procedures in this chapter, read the following warning. WARNING FOR YOUR PERSONAL SAFETY AND PROTECTION OF THE EQUIPMENT: Before you start to work on the computer, perform the following steps in the sequence indicated. 1. Turn off the computer and any attached peripherals. 2. Disconnect the computer and any attached peripherals from AC power sources to reduce the potential for personal injury or shock. 3. Ground yourself by attaching an antistatic grounding strap to your wrist and to an unpainted metal surface on the computer's I/O panel. If an antistatic grounding strap is not available, periodically discharge static electricity from your body by touching one of the connectors on the I/O panel. 1. Determine the power state of the computer. If the display is on, go to step 2. If the display is off, press any key on the keyboard to verify that the computer is not in suspend or standby mode. Then proceed to step 2. 2. Turn off the computer and any attached peripherals. 3. Disconnect the computer and any attached peripherals from AC power sources to reduce the potential for personal injury or shock. 4. Remove the main battery from the battery compartment. On the right side of the computer, press down on the battery cover until it unlocks and pull the battery straight out.
cover
Figure 4-3. Main Battery Removal
Removing and Replacing Parts
4-3
5. Remove the hard-disk drive assembly. Turn the computer over and remove screws HD1 and HD2. Turn the computer right side up. With the computer facing you, slide the hard-disk drive cover to the left and away from the computer. Using the handle on the front of the hard-disk drive, pull the drive straight out of the computer.
handle
cover HD1 HD2
(screws HD1 and HD2 are 10 mm)
10mm
Figure 4-4. Hard-Disk Drive Removal
6. Remove the diskette drive, secondary battery, or CD-ROM from the options drive bay. NOTE: The options bay allows the user to replace the lithium ion battery or diskette drive without turning off or rebooting the computer. This feature is sometimes called hot swapping. The CD-ROM can be inserted or removed while the computer is in suspend mode. This feature is sometimes called warm swapping. However, the CD-ROM must be in the computer before or during boot in order for the drivers to load. Turn the computer over and push the lock towards the options bay. Slide the latch toward the back of the computer (the latch does not move all the way to the lock groove).
device back of the computer
lock
latch
Figure 4-5. Options Bay Lock and Latch
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Keep holding the latch with one hand while pulling the device (diskette drive, secondary battery, or CD-ROM) straight out of the options bay with the other.
Figure 4-6. Diskette Drive, Secondary Battery, or CD-ROM Removal
7. Remove any PC Cards To remove a PC Card from the top connector, press the top eject button (identified by an arrow pointing up). To remove a PC Card from the bottom connector, press the bottom eject button (identified by an arrow pointing down). If you are removing a type III card, press the bottom eject button.
Figure 4-7. PC Card Removal
Removing and Replacing Parts
4-5
ZIF Connectors
Some of the computer's interface connectors are zero insertion force (ZIF) connectors. These connectors are not removable; they must be released to disconnect a cable from them. CAUTION: ZIF connectors are fragile. To avoid breaking the connectors, touch them carefully. Do not apply too much pressure to the movable part of the connector when opening or closing it. To disconnect an interface cable from a ZIF connector, follow these steps: 1. Insert a small flat-blade screwdriver under the movable part of the connector. For most ZIFs, carefully pry up first one end of the movable part of the connector and then the other end. Some ZIFs (keyboard connector on the main board) may need to be lifted in the center.
.
Figure 4-8. Releasing a ZIF Connector
2. Pull up gently on the movable part of the connector until it releases the interface cable. 3. Grasp the interface cable and pull it out of the connector. To reconnect an interface cable to a ZIF connector, follow these steps: 1. Use the flat-blade screwdriver to open the movable part of the ZIF connector. 2. Orient the end of the interface cable with the ZIF connector, and insert the end of the cable into the connector. 3. While holding the cable in place, close the ZIF connector. To ensure a firm connection, make sure the ZIF connector is completely closed.
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Exploded Views of Components and Assemblies
.
LCD panel assembly latch (2)
power/ suspend indicator heat sink
keyboard
bottom assembly diskette drive, secondary battery, or CD-ROM
hard-disk drive
main battery
Figure 4-9. Exploded View--Computer
Removing and Replacing Parts
4-7
front bezel
LCD panel
LCD panel flex cable
latch
power/suspend indicator
hinge (2)
inverter board
back bezel stiffener microphone
inverter board connector
Figure 4-10. Exploded View--LCD Assembly
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.
keyboard flex cable keyboard
keyboard screw cover (2)
heat sink
hinge cover
LCD flexcable cover
touch pad button (2)
power button spring top assembly
touch pad touch pad bracket infrared lens infrared board touch-pad button board
speaker (2)
panel board cable
plastic housing (2)
status-display panel board
Figure 4-11. Exploded View--Top Assembly
Removing and Replacing Parts
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.
audio board
processor board
power board I/O panel door
main board
cache board
I/O bracket
bottom assembly
memory module cover
Figure 4-12. Exploded View--Bottom Assembly
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Dell Latitude LM Systems Service Manual
Factory Repair Parts and Assemblies
This section contains a parts list and procedures for removing and replacing factory components and subassemblies. This information is provided for reference only. Dell does not recommend removal and replacement of these parts in the field. Table 4-1 lists the factory repair parts and assemblies available for the computer. Some parts may only be available as part of a kit or assembly. The subsections that follow provide instructions for removing and replacing these parts and assemblies. An asterisk (*) identifies those parts or assemblies that are replaceable by a customer.
.
Table 4-1. Factory Repair Parts and Assemblies
Part or Assembly Name Order Name AC Adapter/Power Cables
AC Adapter, service kit* AC Adapter* Cable, power, U.S. Cable, power, Australia Battery, main, 42-WH* Battery, secondary* Board assembly, 100-MHz, service kit Main board Processor board, 100-MHz Card, cache Heat sink, microprocessor, subassembly Board, power supply Insulator, main board
* Customer-replaceable unit (CRU)
CUS,ADPT,AC,EXT,16.2V,34W, LMP ADPT,AC,EXT,16.2V,34W,LMP CORD,PWR,110V,6F,AC ADPT,US CORD,PWR,220V,6F,AC ADPT,AUS
Batteries
BTRY,MAIN,42WHR,LIION,LMP BTRY,2ND,LIION,LMP
Board Assemblies
SVC,SYS,PLN,LMP100SD SYS,PLN,3.3V STN LCD,LMP CRD,PRCR,LMP100 CRD,L2,CACHE,LMP SUBASSY,HTSNK,CPU,LMP CRD,CONV,DC-DC,LMP INSUL,MYLAR,PWA,LMP
Removing and Replacing Parts
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Table 4-1. Factory Repair Parts and Assemblies (Continued)
Part or Assembly Name Order Name Board Assemblies (Continued)
Board assembly, 133-MHz, service kit Main board Processor board, 133-MHz Card, cache Heat sink, microprocessor, subassembly Board, power supply Insulator, main board Board, status display panel Board, infrared Board, audio Cable, audio board CD-ROM, service kit* CD-ROM drive Diskette drive assembly* Diskette drive, internal/external Case, upper Case, lower Cable, service kit* Connector, cable
* Customer-replaceable unit (CRU)
SVC,SYS,PLN,LMP133ST SYS,PLN,3.3V TFT LCD,LMP CRD,PRCR,LMP133 CRD,L2,CACHE,LMP SUBASSY,HTSNK,CPU,LMP CRD,CONV,DC-DC,LMP INSUL,MYLAR,PWA,LMP
Boards and Cards
CRD,CNTRL,SPKR,LMP CRD,IR,LMP CRD,AUDIO,LMP CBL,FLEX,JK,AUD,LMP
CD-ROM
CUS,CD ROM,4X,LMP,SANYO CD ROM,4X,LMP,SANYO
Diskette Drive Assembly
CUST,FD,INT/EXT,LMP FD,INT/EXT,LMP PLSTC,UPR,FD,LMP PLSTC,LWR,FD,LMP CUST,CBL,FD,INT/EXT,LMP CBL,FD,INT/EXT,LMP
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Table 4-1. Factory Repair Parts and Assemblies (Continued)
Part or Assembly Name Order Name Hard-Disk Drive Assemblies
Hard-disk drive, 540-MB, service kit* Hard-disk drive, subassembly, 540-MB Hard-disk drive, 540-MB Bracket, hard-disk drive Screws, bracket Hard-disk drive, 810-MB, service kit* Hard-disk drive, 810-MB Hard-disk drive, 810-MB Bracket, hard-disk drive Screws, bracket Hard-disk drive, 1.4-GB, service kit* Hard-disk drive, 1.4-GB Hard-disk drive, 1.4-GB Bracket, hard-disk drive Screws, bracket Keyboard, U.S. Keyboard, Latin/Spanish Keyboard, Japan
* Customer-replaceable unit (CRU)
CUS,HD,540MB,I,F2,12.5MM,NBK SUBASSY,HD,540MB,LF2, 12.5MM,NBK HD,540MB,I,F2,12.5MM,NBK BRKT,HD,12.5MM,LMP SCR,3X.5X3,FLH,PNH,MS,ZPS,HD CUS,HD,810MB,12.5MM,NN,#1, NBK SUBASSY,HD,810MB,12.5MM,NN, NBK HD,810MB,I,F2,12.5MM,NN,#1, NBK BRKT,HD,12.5MM,LMP SCR,3X.5X3,FLH,PNH,MS,ZPS,HD CUS,HD,1.4GB,12.5MM,NN,#1, NBK SUBASSY,HD,1.4GB,12.5MM,NN, NBK HD,1.4GB,I,F2,12.5MM,NN,#1, NBK BRKT,HD,12.5MM,NBK SCR,3X.5X3,FLH,PNH,MS,ZPS,HD
Keyboards
KYBD,87,LMP,US,SMK KYBD,88,LMP,LTN/SPN,SMK KYBD,89,LMP,JPN,SMK
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Table 4-1. Factory Repair Parts and Assemblies (Continued)
Part or Assembly Name Order Name LCD Assembly
LCD panel, active-matrix color display (TFT), 12.1" Board, TFT inverter Cable, TFT flex Bezel, TFT front Bezel, TFT back LCD panel, dual-scan color display (STN), 11.3" Board, STN inverter Cable, STN flex Bezel, STN front Bezel, STN back Latch, LCD, right Latch, LCD, left
LCD,TFT,SVGA,12.1",LMP,IBM CRD,INVRTR,TFT,LMP CBL,LCD,FLEX,TFT,IBM,LMP BZL,LCD,LMP,IBM CVR,LCD,LMP,IBM LCD,STN,SVGA,11.3",LMP, SANYO CRD,INVRTR,STN,LMP CBL,LCD,FLEX,STN,SANYO,LMP BZL,LCD,LMP,SANYO CVR,LCD,LMP,SANYO LTCH,PLSTC,RT,LCD,LMP LTCH,PLSTC,LF,LCD,LMP
Memory
Memory module, 8-MB, service kit* CUS,MEM,8M,LMP Memory module, two 4-MB Memory module, 16-MB, service kit* Memory module, two 8-MB Memory module, 32-MB, service kit* Memory module, two 16-MB Cover, front, hard-disk drive Cover, hinge/infrared lens, right Cover, hinge, left Cover, keyboard screws
* Customer-replaceable unit (CRU)
SIMM,4MB,LXP CUS,MEM,16M,LMP DIMM,8MB,2X32,TL,LXP CUS,MEM,32M,LMP DIMM,16MB,LXP BZL,HDD,LMP CVR,PLSTC,IR,LMP CVR,HNG,LF,LMP CVR,SCR,KYBD,LMP
Miscellaneous Parts
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Dell Latitude LM Systems Service Manual
Table 4-1. Factory Repair Parts and Assemblies (Continued)
Part or Assembly Name Order Name Miscellaneous Parts (Continued)
Cover, flex-cable Insulator, expansion connector Insulator, main board Bracket, I/O Door, I/O Door, memory module Guide, hard-disk drive, left Assembly, base Door, expansion connector (docking port) Screw, hard-disk module, lock Screw, hard-disk bracket Screw, heat sink Screw, keyboard Screw, memory module door Screw, I/O panel standoff Screw, expansion connector (docking port) standoff Service Manual Technical sheet, hard-disk drive Technical sheet, options bay Technical sheet, AC adapter Technical sheet, main battery
CVR,HNG,CTR,LMP INSUL,CON,DCKG,LMP INSUL,MYLAR,I/O,LMP BRKT,I/O,LMP DOOR,I/O,LMP DOOR,RAM,LMP GDE,RL,LF,HD,LMP CVR,BTM,PLSTC,SYS,BAS,LMP DOOR,DCKG,LMP
Screws
SCR,2X.4X8,PHH,MS,BLO SCR,3X.5X3,FLH,PNH,MS,ZPS,HD SCR,2X.4X6,PHH,MS,ZPS SCR,3X.5X3,FLH,PNH,MS,ZPS, KYBD SCR,2X.4X5,FLH,MS,BLO SCR,440X.23,JK,MS,ZPS SCR,CON,JK,DCKG,LMP
Service Documentation
MNL,SERVICE,LMP TSH,HD,LMP,ENG TSH,OPT,BAY,LMP,ENG TSH,AC ADAPT,LMP,ENG TSH,BTRY,LMP,ENG
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Table 4-1. Factory Repair Parts and Assemblies (Continued)
Part or Assembly Name Order Name Service Documentation (Continued)
Technical sheet, whole unit replacement Technical sheet, memory module Diagnostics diskette, service kit, U.S. Diagnostics diskette, service kit, Spanish
TSH,WUE,SVC,LMP TSH,MEM,LMP,ENG
Software
KIT,DSK,DIAG,V3.58,F3,US KIT,DSK,DIAG,V3.58,F3,SPN
Software support diskette, service kit KIT,DSK,SSD,F3,LMP BIOS upgrade, service kit Speaker Insulator, speaker Cover, speaker Top case Button, touch pad, right Button, touch pad, left Spring, touch pad or power button Button, power Touch pad assembly Cable, touch pad Card, touch-pad switch Card, touch pad Insulator, touch pad KIT,FLASH,UPG,F3,LMP/LXi
Speaker
SPKR,AUDIO,LMP INSUL,MYLAR,SPKR,LMP CVR,SCR,SPKR,LMP
Top Case Assembly
CVR,TOP,PLSTC,SYS,BASE,LMP BTN,TPAD,RT,LMP BTN,TPAD,LF,LMP SPR,PWR,KNOB,LMP BTN,PWR,LMP
Touch Pad
ASSY,TPAD,LMP CBL,FLEX,TPAD,LMP SWT,CRD,TPAD,LMP CRD,TPAD,LMP INSUL,MYLAR,TPAD,LMP
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Table 4-2. Naming Conventions
Name in This Manual Name in Other Documents
Main board Processor board Heat sink Inverter board Front bezel Flex-cable cover Back bezel Bottom or base assembly Top assembly Infrared board Diskette drive
Mother board assembly CPU daughter board Daughter card heat-sink assembly Invertor PWA LCD bezel Top cover LCD back plastics Bottom plastics Palm rest plastics I/R PWA Floppy-disk drive
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Deleting the Password
If a user forgets the password and does not have it backed up on diskette, the user must return the computer to the factory where a service provider will delete the password using the following procedure. The computer will then be returned to the user.
C146
Figure 4-13. Capacitor C146 (Location)
To delete the password, use the following procedure: 1. Open the computer and remove the keyboard. See "Keyboard" found later in this chapter. 2. Place a short across the terminals of capacitor C146. 3. Allow time for the CMOS battery to recharge.
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Dell Latitude LM Systems Service Manual
Hard-Disk Drive
hard-disk drive E5
E6
carrier flex-cable connector (screws E1E6 are 4 mm) E3 E1 E2 E4 4 mm
Figure 4-14. Hard-Disk Drive Disassembly
The hard-disk drive resides in a carrier that mounts in the computer's hard-disk drive compartment on the front of the computer. Four screws secure the drive inside the carrier. A mylar insulator provides electrical insulation between the hard-disk drive and the rest of the computer. To disassemble the hard-disk drive from the carrier, follow these steps: 1. Remove the hard-disk drive assembly from the computer. See step 5 of "Precautionary Measures" found earlier in this chapter. 2. Place the hard-disk drive assembly bottom side up on a work surface, and remove screws E1, E2, E3, and E4. 3. Remove the hard-disk drive from the carrier. Gently pry the drive from the carrier with a small scribe. 4. Lift the hard-disk drive out of the bottom case. Carefully pry the flex-cable connector away from the hard-disk drive interface connector on the back of the drive. CAUTION: Use a small flat-blade screwdriver to disconnect the flex-cable connector. Do not handle the flex cable too roughly or you could accidently disconnect the cable from the connector card rather than the drive.
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Diskette Drive
diskette drive and carrier
Figure 4-15. Diskette Drive Assembly
The diskette drive resides in a carrier that slides into the options drive bay on the right side of the computer. The diskette drive and carrier are replaced as a unit and are not disassembled.
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CD-ROM
CD-ROM and carrier
Figure 4-16. CD-ROM Assembly
The CD-ROM resides in a carrier that slides into the options drive bay