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Notice
The information in this guide is subject to change without notice. Compaq Computer Corporation shall not be liable for technical or editorial errors or omissions contained herein; nor for incidental or consequential damages resulting from the furnishing, performance, or use of this material. This guide contains information protected by copyright. No part of this guide may be photocopied or reproduced in any form without prior written consent from Compaq Computer Corporation. Copyright 1995, 1996 Compaq Computer Corporation. All rights reserved. Printed in the U.S.A. Compaq, Deskpro, LTE, Contura, Presario, ProLinea Registered U. S. Patent and Trademark Office. LTE 5000 is a trademark of Compaq Computer Corporation. Contura Registered in the Philippines Patent Office. Microsoft, MS-DOS, and Windows are registered trademarks of Microsoft Corporation. The software described in this guide is furnished under a license agreement or nondisclosure agreement. The software may be used or copied only in accordance with the terms of the agreement. Product names mentioned herein may be trademarks and/or registered trademarks of their respective companies. MAINTENANCE AND SERVICE GUIDE COMPAQ LTE 5000 FAMILY OF PERSONAL COMPUTERS First Edition (September 1995) Second Edition (November 1996) Documentation Part Number 213583-002 Spare Part Number 213622-002

Chapter 1. Product Description
1.1 Computer Features and Models
The Compaq LTE 5000 Family of Personal Computers introduces a new generation of performance notebook computers with advanced modularity, Pentium processors with 64-bit architecture, PCI local bus graphics, and extensive multimedia support. This full- function family of notebook computers allows desktop functionality and connectivity via an optional expansion base.

1.1.1 Computer Features The Compaq LTE 5000 Family of Personal Computers has the following standard features: o Extensive multimedia support with integrated 16-bit digital stereo audio (Microsoft Windows Sound System and SoundBlaster Pro compatible), dual speakers, microphone, full motion video support, optional CD-ROM drive, and optional MPEG and TV Video Adapter o 75, 90, 100, 120, 133, or 150-MHz Intel Pentium processor with 64-bit architecture

o 8 or 16 MB of RAM, expandable to 72 or 80 MB o 512 KB of 64-bit write-back, synchronous, level-2 cache memory available on the LTE5400 model; 256 KB of 64-bit write-back, synchronous, level-2 cache memory available on all other models o Upgradable flash ROM BIOS o High-performance 32-bit PCI local bus graphics with hardware-assisted Motion Video Acceleration (MVA) o Color TFT VGA or SVGA, CSTN VGA or SVGA, or CTFT 1024 x 768 display panels o Keyboard with built-in EasyPoint II pointing device and mouse buttons o Removable hard drive o MultiBay modular device bay that supports a CD-ROM drive, a second hard drive, a second battery pack, or diskette drive, and a full-length ISA slot that allows addition of an ISA expansion board (ISA slot available with MultiBay ISA Expansion Base only) o Two Type III PC Card (PCMCIA) slot that supports one Type III, two Type I, or two Type II PC Cards, LAN connection or data/fax modem o Infrared port for IrDA wireless data transfer, printing, and drive synchronization o Ports and connectors for external equipment (see Section 1.3) o Preinstalled software o Security features o Desktop functionality available with the optional Compaq LTE 5000 MultiBay Expansion Base or MultiBay ISA Expansion Base. 1.1.2 Computer Models The Compaq LTE 5000 Family of Personal Computers is available in the models shown in Table 1-1. Table 1-1. Compaq LTE 5000 Family of Personal Computers Models =========================================================================== Model Processor Display Hard Drive CD-ROM Drive =========================================================================== LTE 5000 Model Pentium/75 10.4-inch 510 MB Optional 510 CSTN CSTN/VGA --------------------------------------------------------------------------LTE 5000 Model Pentium/75 11.3-Inch 810 MB Optional 810 CSTN CSTN/SVGA --------------------------------------------------------------------------LTE 5000 Model Pentium/75 10.4-Inch 810 MB Optional 810 CTFT CTFT/VGA --------------------------------------------------------------------------LTE 5100 Model Pentium/90 10.4-Inch 810 MB Optional 810 CTFT CTFT/SVGA --------------------------------------------------------------------------LTE 5100 Model Pentium/90 10.4-Inch 810 MB Yes

810 CD CTFT CTFT/SVGA --------------------------------------------------------------------------LTE 5150 Model Pentium/100 11.3-inch 810 MB Yes 810 CSTN 800 CTFT/SVGA x 600 --------------------------------------------------------------------------LTE 5200 Model Pentium/120 10.4-inch 1.35 GB Optional 1350 CTFT CTFT/SVGA --------------------------------------------------------------------------LTE 5250 Model Pentium/120 10.4-inch 810 MB Yes 810 CTFT CTFT/SVGA 800 x 600 --------------------------------------------------------------------------LTE 5280 Model Pentium/120 11.3-inch 810 MB Yes 810 CTFT CTFT/SVGA 800 x 600 --------------------------------------------------------------------------LTE 5280 Model Pentium/120 11.3-inch 1.35 GB Yes 1350 CTFT CTFT/SVGA 800 x 600 --------------------------------------------------------------------------LTE 5300 Model Pentium/133 12.1-inch 1.35 GB Yes 1350 CTFT CTFT/SVGA 800 x 600 --------------------------------------------------------------------------LTE 5300 Model Pentium/133 12.1-inch 2.16 GB Yes 2160 CTFT CTFT/SVGA 800 x 600 --------------------------------------------------------------------------LTE 5380 Model Pentium/133 12.1-inch 2.16 GB Yes 2160 CTFT CTFT/10 X 7 1024 x 768 --------------------------------------------------------------------------LTE 5400 Model Pentium/150 12.1-inch 2.16 GB Yes 2160 CTFT CTFT SVGA 800 x 600 ===========================================================================

1.1.3 Preinstalled Software The computer can have either Windows 3.1 or Windows 95 installed. Windows 3.1 Software Components The following software is preloaded if Windows 3.1 is installed: o MS-DOS 6 o Microsoft Windows 3.1 o Cirrus GD-754x Video Driver o TEAC CD-40E CD-ROM Driver and CD Audio Player for DOS o ESS Audio Driver and Audio Clip Library o Compaq Sound System Version 1.70 o Compaq Network Interface Drivers

o Compaq PCMCIA 3.14 o Logitech Mouse Ware 6.46 o PUMA TranXit Version 1.03 o Microsoft Video for Windows 1.10e (Runtime version) o Machine Check Version 1.1 (MACHCHK.SYS) o SystemSoft Suspend-To-Disk Utility 2.20.00 (0VMAKFIL.EXE) o Compaq Supplementary Programs o Microsoft Supplementary Programs o SAFETY & COMFORT GUIDE o COMPAQ DICTIONARY o COMPAQ USER'S GUIDE o ONLINE OPTIONS CATALOG o Compaq Diagnostics for Windows 1.05 o CompuServe WinCIM (1.4/1.2/1.31D/1.31F) o America Online for Windows (North America only) Windows 95 Software Components The following software is preloaded if Windows 95 is installed: o Cirrus Logic GD-754x Video Driver o TEAC CD-40E CD-ROM Driver o Compaq PCMCIA 3.14 Installer for Windows 95 o Logitech Mouse Ware 6.50 o Machine Check Version 1.1 (MACHCHK.SYS) o SystemSoft Suspend-To-Disk Utility 2.20.00 (0VMAKFIL.EXE) o Microsoft Infrared Monitor and Direct Cable Connect o SAFETY & COMFORT GUIDE o COMPAQ DICTIONARY o COMPAQ ONLINE USER'S GUIDE o ONLINE OPTIONS CATALOG 1.1.4 Intelligent Manageability Intelligent Manageability combines innovative hardware technology with PC

LAN management tools from Compaq and other leading vendors to make Compaq portable computers easier to inventory, troubleshoot, and protect. Asset Management AssetControl is asset management software designed to cut the time and cost of conducting a physical inventory of personal computers, key components, and monitors. AssetControl is preinstalled on portable computers, key components, and monitors that support the Video Electronics Standards Association Data Display Channel (VESA DDC) and Extended Display Identification Data (EDID) standards. AssetControl features make it easy and inexpensive to maintain an accurate, up-to-date inventory. Detailed inventory information, including manufacturer, model, serial number, asset tag, and ROM revision level can be viewed, printed, or saved electronically using Compaq Insight Personal Edition or Compaq Insight Manager. Compaq Insight Personal Edition refers to Intelligent Manageability software that diagnoses portable computer hardware, monitors the internal system temperature and IntelliSafe hard drive, and then displays a prefailure warning message on detecting a system temperature or hard drive fault. Compaq Insight Manager refers to Information Manageability software that helps manage servers and personal computers on a network. Compaq Insight Manager features intelligent monitoring and alerting, remote maintenance, and visual control of network resources. Fault Management Fault Management is a utility designed to help prevent the loss of critical data. This feature is available only in the 2.16GB DFP (SMART system compliant drives). Fault Management has the following features: o SMART (IntelliSafe) hard drive - Constantly monitors hard drive activity to predict failures before they occur. o Temperature sensing - Hardware and software that tracks the internal temperature of the computer and displays a warning message when the normal range is exceeded. Compaq Insight Personal Edition displays a pop-up message to notify you when a hard drive or system temperature fault is detected. If the computer is connected to a network managed by Compaq Insight Manager, fault notices are also sent to the network management application. Security Management The security management utility provides a set of security features to protect the computer and data from unauthorized access. o Passwords - Prevents unauthorized access to information stored on the computer or network. o Drive security - Prevents starting the computer from the diskette drive and reading information from the diskette drive. o Device disabling - Prevents unauthorized data transfer over fax/modems, serial ports, parallel ports, and infrared ports.

1.1.5 Security Features The computer has the following security features: o Ability to secure drives in the dedicated hard drive bay and computer MultiBay o Ability to secure the computer and either MultiBay Expansion Base to an immovable object with an optional cable lock o Ability to establish power-on and setup passwords and to disable ports and devices from the Security menu in Computer Setup 1.1.6 Power Management Power Management offers three levels of power conservation: o High: Provides the maximum amount of power conservation and the maximum battery operating time from a single charge. o Medium: Provides a balance between performance and battery life (factory default). o Custom: Conserves power according to user-specified timeout settings. The conservation level sets the timeouts for Standby (Suspend), Hibernation, drives, and screens. Use the Fn+F7 hotkeys to toggle off and on the power management settings in Computer Setup and Windows Power Properties. Selecting to disable the infrared port under the Security menu also conserves power.

Chapter 1.2 Computer Options
The options that are available from Compaq for the computer are described in the following sections.

1.2.1 MultiBay Expansion Base and MultiBay ISA Expansion Base

The MultiBay Expansion Base and the MultiBay ISA Expansion Base provide two additional MultiBay device bays, two PC Card Type III slots, integrated Ethernet, integrated stereo speakers, and computer I/O port replication. The expansion bases are described in Section 1.5. When the computer is docked in an expansion base, the total system functionality includes:

o Support for up to three MultiBay devices simultaneously o Overall system support for up to four hard drives or two diskette drives o Up to three CD-ROM drives installed as follows: - Three CD-ROM drives: The two in the expansion base must be used for data; the CD-ROM drive in the computer can then be used for audio or data.

- Two CD-ROM drives: You can have one in the expansion base and one in the computer; either drive can be data or audio. If both drives are in the expansion base, they must be for data only. - One CD-ROM drive: It can be either data or audio and in either the computer or expansion base. o Two Type III PC Card slots o Overall system support for up to four PC cards o Charging of up to four battery packs

The MultiBay ISA Expansion Base provides the same functionality as the MultiBay Expansion Base, with the following additional features:

o One ISA Expansion slot allows ability to add a full-length ISA expansion board o Additional ventilation exhausts on both sides of the expansion base for increased ventilation o High performance stereo speakers and new audio bass ports on both sides of the expansion base for "PremierSound" CD-quality audio 1.2.2 System Memory Options

The main memory subsystem supports a minimum standard 8 MB or 16 MB of DRAM, expandable to a maximum of 72 or 80 MB. The minimum standard DRAM is integrated on the processor board. The upgrade DRAM is accomplished with memory expansion boards that are available in 8, 16, 32, and 64 MB increments. The memory expansion boards require no special tools for installation and can be installed by the inexperienced user. System memory can be upgraded according to the schedule in Table 1-2:

Table 1-2. Memory Upgrade Schedule =========================================================================== Base Memory Memory Expansion Board Total Memory =========================================================================== 8/16 MB None 8/16 MB 8/16 MB 8/16 MB 8/16 MB 8 MB 16 MB 32 MB 16/24 MB 24/32 MB 40/48 MB

8/16 MB 64 MB 72/80 MB =========================================================================== 1.2.3 Mass Storage Options

The following mass storage options are available for the computer:

o 3.5-inch 1.44 MB Diskette Drive o 510 MB IDE Hard Drive o 810 MB IDE Hard Drive o 1.35 GB IDE Hard Drive o 2.16 GB w/DFP IDE Hard Drive o 2.16 GB IDE Hard Drive

Diskette Drive The computer uses a 3.5-inch diskette drive that is enclosed in a module that fits into the MultiBays of the computer or the MultiBay Expansion Base and the MultiBay ISA Expansion Base. The diskette drive is a three-mode type that is compatible with 1.44 MB, 1.2 MB and 720K AT drive types. The system supports a maximum of two diskette drives: one in the computer, one in the MultiBay Expansion Base. When using Windows 95, real mode drivers must be used for a diskette drive in the expansion base. For more information see "Solving Diskette and Diskette Drive Problems" in Chapter 2. Hard Drive The computer supports an IDE hard drive in the dedicated hard drive bay. Cable select technology is employed for device 0/device 1 (master/slave) selection. The hard drive can be locked in place with the hard drive security screw installed adjacent to the hard drive release on the bottom of the computer. See Appendix C for information on using Compaq LTE Elite hard dives in the computer.

1.2.4 CD-ROM Drive

The modular, 2x, 4x, and 6x CD-ROM drives are available from Compaq as a standard model or an option for the computer or either expansion base. The CD-ROM drive is compatible with industry-standard CD-ROM disc media and formats. It can read:

o CD-Digital Audio o CD-ROM Mode 1 and Mode 2 o CD-ROM/XA Mode 2 (Form 1 and Form 2) o CD-I Mode 2 (Form 1 and Form 2) o Video CD o Photo CD (single and multisession) o ISO 9660 and High Sierra

1.2.5 MPEG and TV Video Adapter

The MPEG and TV Video Adapter option is supported with the computer and both expansion bases. This option provides an MPEG decoder for high quality digital video playback with Windows scaling and interleaved stereo audio, S-Video I/O for laser disc quality playback video, and composite video supporting the NTSC/PAL formats.

1.2.6 Miscellaneous Options

The following options for the computer are also available from Compaq:

o AC Adapter o Automobile Adapter o NiMH Battery Pack o Battery Fastcharger o Enhanced III External Keyboard o Compaq Mouse o Carrying Case o MultiBay Device Carrying Case o MultiBay Hard Drive Adapter

AC Adapter

The AC Adapter supplies DC voltage to the system DC-to-DC converter for use by the system to operate and/or charge the installed battery pack(s). The adapter provides sufficient power to charge each main battery pack in 1.5 hours or less with the system off. The adapter also powers the Battery Fastcharger.

Automobile Adapter The Automobile Adapter is used to charge the computer from an automobile battery. It also powers the Battery Fastcharger. External Battery Fastcharger The external Battery Fastcharger is available from Compaq and has the following features:

o Two battery charge bays o Fast charging of one battery in 1.5 hours

o Fast charging of two batteries in 3 hours

It requires the AC Adapter or Automobile Adapter for power.

Chapter 1.3 Computer External Components
The external components on the front and right sides of the computer are shown in Figure 1-2 and are described in Table 1-3.

Table 1-3. Computer Components - Front and Right Sides

=========================================================================== Item Component Function =========================================================================== 1 Power switch Turns the power on and off. --------------------------------------------------------------------------2 Display switch Turns display off and initiates beep if display is closed with computer on. When used with the standby button, restarts the computer. --------------------------------------------------------------------------3 Standby switch Initiates/exits Standby. When used with the display switch, restarts the computer. When used with the Fn key, initiates Hibernation. --------------------------------------------------------------------------4 Status panel icons The computer is connected to an external power source. QuickLock/QuickBlank has been initiated. Type the power-on password on the blank screen to exit QuickLock/QuickBlank. Power Management is turned on. Run Computer Setup to view or change Power Management settings. A diskette drive in the MultiBay is being accessed. A hard drive in the dedicated hard drive bay or a hard drive or CD-ROM drive in the MultiBay is being accessed. An external monitor is actively displaying information. The built-in speakers on the front of the display or speakers or headphone connected to the computer or expansion base are turned on. Num lock is on, which enables the embedded numeric keypad. Caps Lock is on, which causes new text to be typed in uppercase letters. Scroll Lock is on, which causes the cursor to scroll by fields, rather than by lines. Battery gauges 1 and 2. Gauge 1 turns on if a battery pack is in the dedicated battery bay and shows the amount of charge in the battery pack. Gauge 2 turns on if a battery pack is in the MultiBay and shows the amount of charge in that battery pack.

--------------------------------------------------------------------------5 Ventilation intake Intake vents provide proper airflow to help prevent the computer from overheating. --------------------------------------------------------------------------6 Stereo speakers Built-in stereo speakers for PC and multimedia sound system. --------------------------------------------------------------------------7 Latch Secures computer in a closed position; release to open. --------------------------------------------------------------------------8 Brightness control Adjusts the brightness of the display. Contrast control (not Adjusts the contrast of the display shown) (CSTN models). --------------------------------------------------------------------------9 Standby (suspend) light Illuminates when power to the computer (green) is turned on. Blinks to indicate computer is in Standby (Suspend). --------------------------------------------------------------------------10 Battery light (yellow) Illuminates when a battery pack is charging; turns off when the battery pack is fully charged; blinks to indicate low battery. --------------------------------------------------------------------------11 Microphone Built-in microphone for the Compaq Sound System. --------------------------------------------------------------------------12 PC Card slots Accepts one Type III or two Type II or two Type I PC Cards (PCMCIA). --------------------------------------------------------------------------13 Battery release Releases a battery pack in the battery compartment. --------------------------------------------------------------------------14 Keyboard Keyboard with EasyPoint II pointing device and pick buttons. --------------------------------------------------------------------------15 Battery compartment Dedicated battery compartment for the main battery pack. --------------------------------------------------------------------------16 Hard drive bay Dedicated hard drive bay. --------------------------------------------------------------------------17 MultiBay Bay that supports multiple devices: CD-ROM drive, hard drive, battery pack, or diskette drive. ===========================================================================

The external components on the rear and left sides of the computer are shown in Figure 1-3 and described in Table 1-4.

Table 1-4. Computer Components - Rear and Left Sides =========================================================================== Item Component Function =========================================================================== 1 Serial number Identifies the computer. --------------------------------------------------------------------------2 Serial connector Connects optional serial devices. --------------------------------------------------------------------------3 Parallel connector Connects optional parallel devices. --------------------------------------------------------------------------4 External options Connects the expansion base or the connector optional Automobile Adapter. --------------------------------------------------------------------------5 External monitor connector Connects an external monitor. --------------------------------------------------------------------------6 Power connector Connects the AC Adapter or the optional Automobile Adapter. --------------------------------------------------------------------------7 Stereo speaker/headphone Connects external speakers or jack headphones. --------------------------------------------------------------------------8 Stereo line in jack Stereo line-in jack for CD player, tape deck, tuner, or other line level audio source. --------------------------------------------------------------------------9 Keyboard/mouse connector Connects an external keyboard, numeric keypad, PS/2 mouse, or other pointing device.

--------------------------------------------------------------------------10 Docking sensor Access to a microswitch that initiates the docking scenario when the computer is being docked. Also serves as a guide for the MPEG Adapter. --------------------------------------------------------------------------11 Mono microphone jack Connects a powered electric condenser microphone. --------------------------------------------------------------------------12 Volume control Controls volume to the built-in speakers or to external speakers or headphones connected to the computer or MultiBay Expansion Base. --------------------------------------------------------------------------13 MultiBay device release Releases a drive or battery pack from the MultiBay. --------------------------------------------------------------------------14 Ventilation exhaust Exhaust vent for proper airflow to help prevent the computer from overheating. --------------------------------------------------------------------------15 Infrared port Transfers data to another computer or external device that accepts IrDA format. --------------------------------------------------------------------------16 Security slot Provision for an optional security cable lock to be attached to the computer. ===========================================================================

Chapter 1.4 Design Overview - Computer
This section presents a design overview of the computer. The discussion is limited to the field replaceable parts. All replaceable parts are identified in Chapter 3, and removal/replacement procedures are presented in Chapter 5. The computer is a traditional clamshell design with a display unit and system unit. The computer opens to reveal a backlighted LCD display and keyboard. The display is designed for a continuously adjustable tilt angle. The system unit houses the system board, processor board, power board, keyboard, I/O ports, operator controls and indicators, mass storage device bays, and battery bay. The main components of the system unit include the following:

o Processor (Intel Mobile Pentium 75 MHz, 90MHz, 100MHz, 120MHz, 133mhz, or 150 MHz) o System controller (OPTi 556/557/558N, OPTi 602A) o VGA controller (Cirrus CL-GD754x) o Keyboard controller (Intel 80C51SL) o PCMCIA controller (Cirrus 6722)

o Super I/O (National 87334) o Audio controller (ESS688 or ESS1688) o Power controller (47P440AF)

The boards on which these controllers reside are identified in the sections that follow.

1.4.1 Display Unit

The display unit includes the following field replaceable components:

o Display assembly o Display bezel with speakers o Release latches o Brightness control actuator o Contrast control actuator (CSTN models only) o Clutch assemblies o Compaq logo

Display Assembly The display assembly is replaced as a complete unit that includes:

o LCD panel o LCD inverter o Display bezel o Stereo speakers o Clutch assemblies o Release latches o Brightness control actuator o Contrast control actuator (CSTN models only) NOTE: The display bezel, release latches, brightness/contrast control actuator(s), Compaq logo, and clutch assemblies can also be replaced individually. The speakers are permanently installed on the display bezel.

The following LCD panels are supported:

o 10.4-inch (26.4 cm) CSTN VGA Display (640 x 480) o 11.3-inch (28.7 cm) CSTN SVGA Display (800 x 600) o 10.4-inch (26.4 cm) CTFT VGA Display (640 x 480) o 10.4-inch (26.4 cm) CTFT VGA Display (800 x 600) o 11.3-inch (28.7 cm) CTFT SVGA Display (800 x 600) o 12.1-inch (30.7 cm) CTFT SVGA (800 x 600) o 12.1-inch (30.7 cm) CTFT 1024 x 768 Display

Both LCD panels have a controllable backlight intensity that can be adjusted with a slide switch. The CSTN (dual scan) panels also have a slide switch for contrast control. The LCD panel inverter cable plugs into an 8-pin connector on the processor board. The LCD cable plugs into a connector on the system board. The inverters and cables differ according to the display type and manufacturer and cannot be interchanged. All of the display cables are routed to the system unit in the vicinity of the clutches.

NOTE: It is important that these instructions be followed when replacement of any part requires removal of the display assembly.

Slide the display assembly back in place and replace all screws. The screws must be fully tightened to ensure that they do not touch the expansion base sensor located near the left hinge. Failure to properly seat the screws may prevent the unit from booting up.

NOTE: Use Fn+F4 hotkeys to switch between external, internal, and simultaneous display. (The CSTN 800 x 600 does not support simultaneous display.)

Display Bezel With Speakers The display bezel attaches to the display unit with a snap action and is secured with a screw at each corner. Screw covers are installed over the screw heads. After removing these screws, use a Compaq bezel removal tool to separate the bezel from the display assembly. The display bezel can be removed without separating the display unit from the system unit. The internal stereo speakers are 0.5-watt, 8-ohm, permanently installed in the top corners of the display bezel and are installed as a unit with cabling attached. The speaker cable is routed into the system unit and connects to a 4-pin connector adjacent to the 30-pin LCD connector on the system board. The CPU cover is easily removed from the system unit to access this connector. NOTE: Use Fn+F5 hotkeys to toggle speakers/headphones off and on.

Release Latches The release latches serve to lock the display and system units together when the computer is in the closed position. Each latch assembly consists of three parts:

o Latch actuator o Latch hook o Latch spring

The release latch assembly is available as a field replaceable unit. The display bezel must be removed to replace the latch assemblies. The release latches are mounted in the display unit back cover. The display bezel must be removed to access the latches. The latches snap into place and require a simple depression of a tab to be released from the display cover. Brightness/Contrast Control Actuator(s) The displays have a controllable backlight intensity that can be adjusted with a slide switch. The CSTN panels also have slide switch for contrast control. The actuators for these adjustments are available as field replaceable units. The brightness/contrast control actuator(s) (contrast control actuator on CSTN displays only) are mounted on the display bezel with a snap action. The display bezel must be removed to allow the tabs on the back side of the actuator to be depressed for removal. When installing a display bezel, make certain the brightness/contrast actuator(s) aligns with the brightness/contrast control(s) in the display assembly. Clutch Assemblies The clutch assemblies provide the hinge function between the display unit and system unit and also provide continuous tension that allows the display unit to be positioned at any angle. The clutch assemblies are available in pairs as field replaceable units. Each clutch assembly is mounted to the display unit with two screws and to the system unit with two screws. Removal and replacement of the clutch assemblies requires removal of the display bezel and the CPU cover (on the system unit). Compaq Logo The Compaq logo is installed on the back of the display unit. The location for the logo is indicated by an ellipse embossed in the cover. The logo is an adhesive-backed label that is available as a field replaceable unit. The label indicates which processor is installed in the computer.

1.4.2 System Unit

The system unit contains the following field replaceable units:

o CPU cover o Internal microphone o Status panel o Processor board o Power board o Cooling fan o System board o Memory expansion board (optional) o Keyboard assembly o Auxiliary battery o Miscellaneous plastic parts

CPU Cover The CPU cover is located above the keyboard and is secured in place with three screws on the rear panel of the system unit. Tabs on the front edge of the CPU cover engage slots across the top edge of the keyboard panel. The CPU cover contains the actuators for the following:

o Power switch o Standby (Suspend) button o Display switch

The CPU cover with all switch actuators installed is available as a field replaceable unit. The switch actuators are also available as field replaceable units. The power switch actuator and spring and the standby (suspend) button actuator and spring are removed by squeezing the actuator tabs on the underside of the CPU cover and pushing the buttons out of their mounting hole. The display switch actuator simply snaps out of its mounting hole from the underside of the CPU cover. The CPU cover must be removed to service any of the above described switch actuators. The cover also must be removed to disconnect any of the display unit cables from the system unit, to remove the display unit, to service the status panel, and to remove the keyboard assembly. Internal Microphone The internal microphone is supported by the audio subsystem and connects

to the system board. It is an omnidirectional condenser microphone with a standard sensitivity of 40dB. The microphone is mounted in a rubber boot to provide acoustic isolation and is mounted at the right side of the keyboard, under the CPU cover. Status Panel The status panel is located immediately below the LCD panel on the system unit. The panel displays a series of icons to indicate system status as described in Table 1-3. The status panel also contains two status indicator lights. The right indicator light provides battery status; the left indicator light provides power-on and Standby (Suspend) status. Access to the display panel for service requires removal of the CPU cover. The status display is secured with two screws. The status panel cable plugs into an 8-pin connector on the processor board. Processor Board The processor board supports the following:

o Processor o DC-to-DC converter is used only with processors that operate at higher than 75 MHz. o L2 cache o System RAM o System memory expansion connector o Power, display, and standby switches o Infrared serial port (IrDA) o Display panel configuration jumpers o Power-on password jumper

The computer supports 75, 90, 100, 120, 133-, and 150-MHz Mobile Pentium processors. The processor is soldered to the processor board, so replacement is accomplished by replacing the processor board. A heat sink on the processor and a cooling fan maintain an operating temperature within the limits specified by the CPU manufacturer and other components.

All I/O buffers operate at 3.3 volts.The 75-MHz processor core operates at 3.3 volts. The 150-MHz processor core operates at 3.1 volts. The 90-Mhz, 100mhz, 120-MHz, and 133-MHz processor cores operate at 2.9 volts. The 2.9 volts is provided by a DC-to-DC converter mounted on the processor board.

The processors are of a tape carrier package (TCP) design that has a high pin count, low profile, and reduced footprint. The processor is easily damaged, so the pins and body of the processor should not be touched.

The L2 cache is implemented as direct-mapped, write-back cache with a size of 256 KB. The power switch, display switch, and standby (suspend) button are mounted on the processor board. They are operated by switch actuators mounted on the CPU cover. The power switch turns system power on and off. When the switch is pushed to turn the power off, the system displays a warning message that all unsaved data will be lost. The shut down process is then completed by pressing Enter. The display switch turns the display off and initiates a beep if the display is closed with the computer on. When used with the standby switch, the display switch initiates a system restart. The standby (suspend) button initiates and exits Standby (suspend). As described above, the standby button, when used with the display switch, initiates a system restart. When used with the Fn key, the standby button initiates Hibernation. The processor board contains 8 MB or 16 MB of onboard memory and can be expanded to 72 or 80 MB by adding a 64 MB memory expansion board. The memory expansion boards are available in 8, 16, 32, and 64 MB DRAM configurations. Each module is composed of two boards assembled together. The system ROM is shadowed in system memory. The infrared subsystem (IrDA) provides two-way wireless communication using infrared as a transmission medium. Proper operation requires the communicating infrared ports to be within a 30-degree path and no more than three feet (1 meter) apart. The processor board must be configured according to the display type. This is done by setting Jumpers JP2, JP3, and JP4 on the processor board. Use Table 1-5 to determine proper jumper settings for the display.

Table 1-5. Display Configuration Jumpers =========================================================================== Display Type Jumper JP3 Jumper JP2 Jumper JP4 =========================================================================== LTE 5000 10.4 in VGA CSTN 1-2 2-3 1-2 LTE 5000 10.4 in VGA CTFT LTE 5000 11.3 in SVGA CSTN LTE 5100 10.4 in SVGA CTFT LTE 5200 10.4 in SVGA CTFT LTE 5280 11.3 in SVGA CTFT LTE 5300 12.1 in SVGA CTFT LTE 5150 Rev. 4X 11.3 in SVGA CSTN LTE 5150 Rev. 2X SVGA CSTN 2-3 1-2 2-3 2-3 2-3 2-3 2-3 2-3 2-3 2-3 2-3 2-3 1-2 2-3 2-3 2-3 2-3 2-3

1-2 2-3

1-2 1-2

1-2 1-2

LTE 5250 10.4 in SVGA CTFT LTE 5380 12.1 in 1024 x 768 CTFT

2-3

2-3

2-3

2-3

1-2

1-2

LTE 5400 12.1 in 1024 x 768 CTFT 2-3 2-3 2-3 ===========================================================================

The power-on password jumper is also located on the processor board. To erase the power-on password, set jumper JP1 to pins 1 and 2; set JP1 to pins 2 and 3 for normal operation. See Chapter 2 for more details. To remove and replace the processor board, you must first remove the CPU cover, EMI shield, keyboard, and display unit. The processor board is secured in place with two screws and is connected to the system board with two connectors. System Board There are three system boards for the computer: one to support the 75 MHz, 90 MHz and 120 MHz processors (LTE 5000, LTE 5100, and LTE 5200); one to support the 120 MHz, 100MHz, and 133 MHz processors (LTE 5280, LTE 5300, LTE 5150, and LTE 5250); and one to support the 133 MHz processor (LTE 5380) and 150MHz processor (LTE 5400). The system board supports the following:

o System ROM (BIOS) o Graphics subsystem o Audio subsystem o PC Card subsystem o Diskette drive controller o RS-232 and IrDA serial ports o IDE interface o Fan connector o I/O connectors

The firmware components for the computer include:

o System BIOS for the OPTi Viper Notebook chip set o ROM-based setup o MAXIMIZER Power Management for OPTi Viper o APM 1.1 BIOS o Plug and Play BIOS

o PCI BIOS o Keyboard Controller Firmware for the Intel 80C51SL o VGA BIOS

The ROM-based setup has been translated into ten languages in addition to English. Messages that are displayed by the BIOS which require no user interaction are displayed in English. This includes POST warning messages, error messages, and runtime warnings and notifications. Messages that are displayed by the BIOS which require user interaction are translated into the same language as Setup.

The graphics controller interfaces with the system through the PCI bus. The controller provides backward compatible modes to support CGA, EGA, MGA, and HGA as well as all current VGA and SVGA modes. The controller supports the internal LCD panels as well as an external CRT and simultaneously supports the LCD and CRT (except for models with the 11.3-in CSTN SVGA display). The CRT interface is also routed to the either expansion base through the external options connector. For LCD only and LCD/CRT simultaneous display modes, the following panel and color resolutions are supported: Table 1-6. Maximum Resolutions Supported =========================================================================== Display Type Display Modes Color Depth Supported =========================================================================== 640 x 480 CTFT 640 x 480 256, 64K, 16M 800 x 600 CTFT 640 x 480 CSTN 800 x 600 CSTN 640 x 480, 800 x 600 640 x 480 640 x 480, 800 x 600 256, 64K 256, 64K 256

1024 x 768 CTFT 1024 x 768 256 ===========================================================================

The graphics controller also supports display of real-time video from the MPEG and TV Video Adapter at a rate of 30 frames per second (fps). It provides the capability to overlay the video in a Windows screen. The computer has 1 MB of video DRAM soldered to the system board. is no provision for adding additional video memory. There

The graphics subsystem is designed to minimize the use of power at all times. When the system is idle for a set period of time, the controller is placed in the lowest power state. The LCD panel backlight and panel power are turned off during periods of inactivity after a timeout as determined by the user in Computer Setup. The system supports Energy Star monitors and allows the feature to be turned on/off from Computer Setup. The computer supports an interface to an MPEG and TV Video Adapter that attaches to the rear of the computer. The adapter provides up to 30 fps of live video or MPEG video to the graphics controller for display on the LCD, a CRT, or a television. The MPEG and TV Video Adapter and CD-ROM

drive can be used simultaneously. The audio subsystem is integrated into the system board. The system supports an internal microphone, stereo speakers, SoundBlaster PRO compatible audio, CD-ROM audio inputs, an external jack for headphones or speakers, microphone jack, and line-input jack. Line and CD-ROM inputs and the speaker outputs are passed through the external options connector and supported by both expansion bases. The internal speakers are disabled when the computer is docked in the expansion base and when headphones or external speakers are installed. The heart of the audio subsystem is the ESS1688 (ESS688 on Windows 3.1/Dos 6 units) AudioDrive ASIC that provides 16-bit stereo WAV audio, audio mixing, and FM music synthesis. The entire audio system connects directly to the ISA bus. The ESS1688 is OPL3 compatible and compatible with SoundBlaster PRO and Microsoft Windows Sound System. It can record, compress, and play back sound and music at 8 or 16 bits up to 44 Khz. The computer has one PC Card (PCMCIA) controller that supports a Type III PC card slot that supports either two Type II PC Cards or one Type III PC Card. A PC card door prevents contamination of the slot. The controller is Intel ExCA compatible and complies with the Berlin revision of the PCMCIA standard. The controller supports 5-V cards and all current Compaq PC Cards. A second PC Card controller is located in both expansion bases. The diskette drive controller supports 720K, 1.2 MB, and 1.44 MB densities as well as automatic media detection. Diskette drives can be used in the computer MultiBay and the expansion bases. When using Windows 95, real mode drivers must be used for a diskette drive in the expansion base. For more information see "Solving Diskette and Diskette Drive Problems" in Chapter 2. The PC87334 Super I/O contains two UARTs which are fully compatible with NS15450 and NS16550. Both ports support MIDI baud rates and one port also supports IrDA and HP SIR compliant signaling protocol. The two serial ports are configured as one RS- 232C serial port and one infrared (IrDA) port.

o The standard RS-232 serial port has an 82550 compatible serial controller. The physical connector is a standard 9-pin D connector. The interface can be configured as COM1, COM2, COM3, or COM4. o The infrared communication is implemented with an 82550 compatible serial controller. The minimum data rate supported by the Infrared Port is 115K bits per seconds. The interface can be configured as COM1, COM2, COM3, or COM4.

The parallel port support is integrated into the PC87334 Super I/O. The computer has one parallel port that can be configured to operate in compatible mode, enhanced modes 1.7 and 1.9 (EPP), and extended capabilities (ECP) mode (IEEE-1284 compatible). The default mode is the compatible mode. The physical connector is a standard 25-pin D connector. The parallel port interface can be configured as LPT1, LPT2, or LPT3. When the computer is mounted in either expansion base, the system can

support up to four IDE hard drives. When using two hard drives in the computer, one of the hard drives is installed in the dedicated hard drive bay and the other in the MultiBay.

NOTE: The dedicated hard drive bay provides limited support for the Compaq LTE Elite hard drive. See Appendix C for details.

The hard drive remains powered off from Standby (Suspend) until the first access occurs. The hard drive is powered off during Standby (Suspend). The cooling fan is mounted in the system unit on the left side at the ventilation exhaust port. Functioning as an exhaust fan, it provides air flow across the electronic components for cooling. The fan plugs into a 2-pin connector on the system board. The I/O connector panel is an integral part of the system board. In addition to the I/O panel, the system board supports the following:

o PC card rails and connectors o Battery bay contacts o Hard drive bay connector o MultiBay mass storage device connector o MultiBay battery contacts o Power board connectors o Processor board connectors o Fan connector o LCD panel connector o Speaker connector o Integrated microphone connector o External microphone connector o Volume control

The CPU cover, display unit, keyboard, processor board, and power board must be removed prior to removing the system board. The system board is secured with two screwlocks on the I/O connector panel, a standoff in the left rear corner, and three screws.

IMPORTANT: Correct positioning of the system board is essential for proper interconnect of the computer with either expansion base. When installing a system board, be sure the locating pins near the mounting screws properly engage the system board.

A connector on the rear of the computer interfaces with either expansion base to provide additional functionality. The expansion base replicates the following computer connectors:

o Serial connector o Parallel connector o External monitor connector o PS/2-compatible mouse connector o Power connector o External keyboard connector o All audio connectors except mono microphone jack

Additional MultiBay Expansion Base and MultiBay ISA details are presented in Section 1.5. Power Board The power board is a DC-to-DC converter that provides the required voltages of +3.3 and +5 volts from one of the power sources (main battery pack, AC Adapter, or Automobile Adapter). The power board is provided as a field replaceable unit. To remove and replace the power board, you must first remove the CPU cover, keyboard, and processor board. The power board connects to the system board with two connectors and is secured in place with one screw. Keyboard The keyboard is available as an assembly consisting of the following parts:

o Keyboard o Keyboard bezel o Battery release o MultiBay device release o EasyPoint II controller

The battery release, MultiBay device release, and EasyPoint II controller are also available as replaceable units. To remove the keyboard assembly, the CPU cover must be removed first. The keyboard ribbon cable (ZIF connector) and EasyPoint II controller cable must be disconnected. Three screws on the bottom on the system unit and four screws across the front (inside of the MultiBay and dedicated battery compartment) must then be removed to release the keyboard.

The battery release mechanism consists of the following parts:

o Battery release actuator o Battery release spring o Battery release holder o Battery release hook o Battery release hook spring

All of these components are included in the Latches Kit. The battery release spring maintains the mechanism in the latched state until the release actuator is pushed. This action retracts the release hook from the battery. The release hook spring ensures that the battery hook firmly engages the battery. The battery release holder serves as a mounting platform for the other release mechanism components. The release hook and release hook spring are fastened to the release holder with a screw. The release spring connects the release actuator to the holder. The holder is held to the bottom of the keyboard with two screws. The MultiBay device release mechanism is very similar to the battery release mechanism and consists of the following parts:

o MultiBay device release actuator o MultiBay release spring o MultiBay release holder o MultiBay release hook o MultiBay release hook spring o CD-ROM drive release bar

All of these components are included in the Latches Kit. The MultiBay device release spring maintains the mechanism in the latched state until the release actuator is pushed. This action retracts the release hook from the diskette drive or hard drive. Pushing the release actuator also causes the CD-ROM drive release bar to eject a CD-ROM drive if one is installed. The release hook spring ensures that the release hook firmly engages the device in the MultiBay. The MultiBay release holder serves as a mounting platform for the other release mechanism components. The release hook and release hook spring are fastened to the release holder with a screw. The release spring connects the release actuator to the holder. The holder is held to the bottom of the keyboard with a screw and standoff. The EasyPoint II controller supports the mouse buttons and the EasyPoint II pointing stick. It is mounted to the bottom of the keyboard assembly directly under the mouse buttons. The CPU cover and keyboard must be removed to gain access to the controller. Two screws hold the controller

to the keyboard. Once released, the flat cable can be disconnected from the ZIF connector on the underside of the controller. MultiBay The MultiBay accommodates the following devices:

o Dual-speed, quad-speed, or 6x CD-ROM drive o Second hard drive o Second battery pack o 3.5-inch diskette drive NOTE: The hard drive must be mounted in the MultiBay hard drive carrier before it can be installed into the MultiBay.

The computer must be turned off when inserting a drive (not the battery pack) or removing it from the MultiBay.

Chapter 1.5 Optional MultiBay Expansion Base and MultiBay ISA Expansion Base Features
The MultiBay Expansion Base and MultiBay ISA Expansion Base provide fully integrated desktop capabilities for the computer. The expansion base eliminates the need to disconnect external devices when you remove the computer from the expansion base. The optional expansion base has the following features:

o Two MultiBay device bays o One serial port o One parallel port o PS/2 mouse port o External keyboard port o One SVGA CRT port o Ethernet RJ-45 and BNC ports o Two Type III PC Card slots o Audio line out, headphones out o Audio line in o IR interface for IrDA wireless operations o Battery charge indicators o Drive activity indicators

o Security features o Stereo speakers o ISA expansion slot (MultiBay ISA Expansion Base) o High performance stereo speakers and new audio bass ports on both sides of the expansion base for Compaq PremierSound audio system (MultiBay ISA Expansion Base)

Chapter 1.6 MultiBay Expansion Base and MultiBay ISA Expansion Base Components
The external components on the front and right sides of the expansion base are shown in Figure 1-4 and described in Table 1-7.

Table 1-7. Expansion Base Components - Front and Right Sides =========================================================================== Item Description =========================================================================== 1 Monitor support cover slots 2 3 External options connector Stereo speakers (MultiBay Expansion Base model)

4 5 6 7 8 9 10 11 12 13 14

MultiBay II device release button MultiBay II PC Card release buttons Ventilation exhausts (MultiBay ISA Expansion Base model) PC Card slots ISA slot access door (MultiBay ISA Expansion Base model) Stereo speaker (MultiBay ISA Expansion Base model) Security cable slot Docking lever Audio bass port (MultiBay ISA Expansion Base model) Battery lights

15 Docking aid ===========================================================================

Additional components on the front of the expansion base and the components on the left side of the expansion base are shown in Figure 1-5 and described in Table 1-8.

Table 1-8. Expansion Base Components - Front and Left Sides =========================================================================== Item Description =========================================================================== 1 MultiBay I device release button 2 3 4 5 6 7 8 9 10 11 12 MultiBay I Docking sensor probe Stereo speakers (MultiBay Expansion Base model) Alignment guide Power light Power button Infrared port MultiBay drive lights Audio bass port (MultiBay ISA Expansion Base model) Stereo speaker (MultiBay ISA Expansion Base model) Ventilation exhaust (MultiBay ISA Expansion Base model)

13 AC power connector ===========================================================================

The external components on the rear panel of the expansion base are shown in Figure 1-6 and described in Table 1-9.

Table 1-9. Expansion Base Components - Rear Panel =========================================================================== Item Description =========================================================================== 1 External mouse connector 2 3 4 5 6 7 8 External keyboard connector Stereo speaker/headphone jack Stereo line in jack Ethernet RJ-45 connector Ethernet BNC connector MIDI/Game connector External monitor connector

9 10 11 12

Parallel connector Serial connector Auxiliary fan (MultiBay ISA Expansion Base model) MPEG and TV Video Adapter connector

13 ISA slot cover (MultiBay ISA Expansion Base model) ===========================================================================

Chapter 1.7 Design Overview - MultiBay Expansion Base and MultiBay ISA Expansion Base
In addition to replicating the computer I/O panel and offering additional mass storage device bays, the expansion bases include the following:

o Main board with integrated Ethernet o MultiBay connector board o Power supply o IrDA interface o Activity lights o MultiBays with ejectors o PC Card slots o ISA expansion board slot (MultiBay ISA Expansion Base model) o Computer docking mechanism 1.7.1 Main Board

The expansion base main board supports the following major components:

o Ethernet controller (National DP83907) o PCMCIA controller (Cirrus 6722) o Super I/O (National 87334) o Power controller (TMP47P440AF)

The Ethernet controller supports an integrated 10MB/sec Ethernet subsystem with 10BaseT and 10Base2 interfaces. The Super I/O component supports the MultiBays.

1.7.2 MultiBay Connector Board

The MultiBay connector board is mounted between the two MultiBays and serves to route the appropriate signals to the MultiBay connectors.

1.7.3 Power Supply

The power supply is an AC-to-DC converter that serves the same function as the AC adapter and DC-to-DC converter in the computer. It provides regulated DC power for all of the subsystems. The expansion base uses a standard AC power cord that connects directly to the power supply. An external fan mounted on the power supply provides cooling. When the temperature of the power supply exceeds 104oF (40oC), the fan turns on. When the temperature drops below 104oF, the fan turns off. The MultiBay ISA model has an auxiliary cooling fan mounted on the rear of the bottom case. The auxiliary fan remains active as long as power is applied to the MultiBay ISA Expansion Base.

1.7.4 IrDA Interface

The IrDA interface is mounted on the front left corner of the expansion base and shares a small PCB with the removable drive status lights. The board is mounted to the underside of the expansion base top cover with a single screw. The IrDA interface on the expansion base replicates the IrDA interface on the computer.

1.7.5 Activity Lights

The expansion base has two sets of activity lights. Removable-Drive Lights The removable-drive lights are installed on the front left of the expansion base and share a small PCB with the IrDA interface. The board is installed as a unit from the back side of the expansion base top cover. The status lights are identified in Figure 1-7 and described in Table 1-10.

Table 1-10. Removable Drive Lights =========================================================================== Index Function Description =========================================================================== 1 Computer diskette drive light Diskette drive in computer MultiBay is being accessed 2 Computer hard drive/CD-ROM drive light MultiBay hard drive/CD-ROM drive light Hard drive or CD-ROM drive in computer is being accessed Hard drive or CD-ROM in one of the expansion base MultiBays is being accessed.

3

Diskette drive in one of the expansion base MultiBays is being accessed ===========================================================================

4

MultiBay diskette drive light

Battery Lights The battery lights are installed on the front right of the expansion base and share a small PCB with the power button and power light. The board is installed as a unit from the back side of the expansion base top cover. The battery lights are identified in Figure 1-8 and described in Table 1-11.

Table 1-11. Battery Lights =========================================================================== Index Function Description =========================================================================== 1 Computer MultiBay battery Status of battery pack in computer light MultiBay 2 Computer battery light Status of battery pack in computer battery compartment Status of battery in MultiBay on the right side of the expansion base

3

MultiBay II battery light

4

Status of battery in MultiBay on the left side of the expansion base =========================================================================== 1.7.6 MultiBays with Ejectors

MultiBay I battery light

Each expansion base has two MultiBays. Each MultiBay is removable as a unit with its ejector mechanism. The MultiBay is held to the expansion base cover with three screws. The MultiBays in the expansion base accommodate the same drives that are used by the computer and can be used

to charge batteries. MultiBay I will accept Compaq LTE Elite hard drives.

1.7.7 PC Card Slots

Each expansion base has two Type III PC Card slots to the PC card slots on the computer. Each PC Card base supports one Type I, one Type II, or one Type serviceable part of the PC card slots are the slot connectors are incorporated into the main board.

that function similarly slot on the expansion III PC Card. The only doors. The rails and

1.7.8 Computer Docking Mechanism

The computer docking mechanism has a lever that protrudes from the right side of either expansion base and serves to aid in seating the computer when it is pushed toward the rear of the expansion base. The lever releases the computer from the expansion base when it is pushed toward the front of the expansion base.

1.7.9 ISA Expansion Board

The MultiBay ISA Expansion Base provides one slot for an 8- or 16-bit, full-length industry-standard (ISA) expansion board. The following provisions must be considered when choosing the type of ISA expansion board to be installed in the expansion base:

o The enhanced video performance of the Compaq LTE 5000 Family of Personal Computers drives an external monitor at resolutions up to 1024 x 768 x 256 colors and at selectable refresh rates up to 72 Hz, making the use of ISA graphics controller boards unnecessary. If an ISA graphics controller card is installed, the system will not operate. Graphics controller boards are not supported. o If a National NE2000 or compatible network ISA board is installed, the built-in ethernet connectors in the expansion base are disabled. To re-enable the built-in ethernet network feature, the NE2000 or compatible network ISA expansion board must be removed.

Two Network Interface Cards (NICs) can be enabled at one time as long as both are not NE2000 or compatible.

NOTE: NICs that have a default address of 300h require setup configuration changes because the built-in ethernet uses the 300h address. o Some Moving Picture Experts Group (MPEG) ISA boards cannot be installed as they require connection to the "feature connector" of the graphics controller. This feature connector is not provided on the MultiBay ISA Expansion Base. MPEG ISA boards with a standard video port (external monitor connector) that do not require connection to the feature connector on the graphics controller should function satisfactorily.

The Compaq MPEG and TV Video Adapter option provides enhanced MPEG capabilities for use with the Compaq LTE 5000 Family of Personal Computers. To achieve maximum MPEG functionality support, use the Compaq MPEG and TV Video Adapter option.

o Due to the vast numbers of ISA expansion boards that are available, Compaq does not guarantee or support every ISA expansion board.

Refer to the documentation accompanying the ISA expansion board being installed for complete installation and configuration instructions.

Chapter 2. Troubleshooting
Chapter 2.0 Introduction
This chapter contains troubleshooting information for the computer. The basic steps in troubleshooting include:

1. Completing the preliminary steps listed in Section 2.1. 2. Running the Power-On Self-Test (POST) as described in Section 2.4. 3. Running the Computer Checkup (TEST) as described in Section 2.5. 4. Performing the recommended actions described in the diagnostic tables in Section 2.7 if you are unable to exercise POST or Computer Checkup or if the problem persists after running POST and Computer Checkup.

Adhere to the following guidelines when troubleshooting:

o Complete the recommended actions in the order in which they are given. o Repeat POST and Computer Checkup after each recommended action until the problem is resolved and the error message does not return. o Once the problem is resolved, do not complete the remaining recommended actions. o Refer to Chapter 5 for any removal and replacement procedures that are recommended.

Chapter 2.1 Preliminary Steps
IMPORTANT: Use the AC adapter when running POST, Computer Setup, or Computer Checkup. A low battery condition could initiate Standby (Suspend) and interrupt the test.

Before running POST and Computer Checkup, complete the following steps:

1. If a power-on password has been established, type the password and press Enter. NOTE: The key icon appears on the status display when the computer is turned on to indicate that QuickLock/QuickBlank has been initiated. Type the power-on password to exit QuickLock/QuickBlank. If the password is unknown, it must be cleared (see Section 2.2). 2. Run Computer Setup (Section 2.3). 3. Position the brightness control actuator and contrast control actuator (on selected models) in the center of their ranges and leave the

display open. 4. Turn off the computer and all external devices. 5. Disconnect any external devices that you do not want to test. If you want to use the printer to log error messages, leave it connected to the computer. NOTE: If a problem only occurs when an external device is connected to the computer, the problem could be with the external device or its cable. Isolate the problem by running POST with and without the external device connected. 6. Use Advanced Diagnostics and loopback plugs in the serial and parallel connectors if you plan to test these ports. To run Advanced Diagnostics, complete the following steps: a. Insert the Diagnostics diskette into the diskette drive and turn on the computer. b. At the Welcome Screen, press Ctrl + A. c. Press Enter to accept OK. d. Select Computer Checkup (TEST). e. Select Prompted Diagnostics after "Identifying System Hardware" completes. f. Select Interactive Testing and follow the displayed instructions.

Refer to Chapter 3 for description and spare part number for the loopback plugs.

7. Ensure that the primary hard drive is installed in the computer. 8. Ensure that the battery pack is installed in the computer and the AC Adapter is connected to the computer and plugged into an AC power source.

After completing the preliminary steps, run POST (Section 2.4) and Computer Checkup (Section 2.5).

Chapter 2.2 Clearing the Power-On and Setup Passwords
The power-on password prevents use of the computer until the password is entered. The setup password prevents unauthorized changes to Computer Setup. To clear the passwords, you must remove and replace a jumper on the system board. If you do not know the passwords, use the following procedure to clear the password:

1. Complete the preparation for disassembly procedures in Section 5.3. 2. Remove the CPU cover as described in Section 5.5.

3. Move the jumper on JP1 (Figure 2-1) from pins 2 and 3 to pins 1 and 2.

4. Turn on the computer and run POST. 5. Turn off the computer and move the JP1 jumper to pins 2 and 3 for normal operation.

Chapter 2.3 Running Computer Setup
The ROM-based Computer Setup displays the current system configuration and allows you to set system and power management parameters. These parameters are stored in CMOS, and a backup copy is saved in a parameter block in system flash ROM. You can access Computer Setup by pressing F10 when the prompt appears after you turn on or restart the computer. The following configuration parameters can be changed in Computer Setup:

o Date and time o Power conservation (when)

o Power conservation (level) o PC Card slot power management o Hibernation on/off o Hibernation settings o Warning beep o Setup password o Diskette drive disable o Serial/IrDA ports disable o Parallel port disable o PC Card slots disable o Resume password on/off o Boot memory test o Keyboard numlock o Boot sequence o Boot display o Serial port settings o Infrared port settings o Parallel port settings o Power-on password o Diskette drive boot disable o NTSC/PAL o Windows 95 Power Properties o Lid closure notification o Advanced LPT mode

Computer Setu