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HP OmniBook 900
Service Manual
Notice
In a continuing effort to improve the quality of our products, technical and environmental information in this document is subject to change without notice. This manual and any examples contained herein are provided "as is" and are subject to change without notice. Hewlett-Packard Company makes no warranty of any kind with regard to this manual, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Hewlett-Packard Co. shall not be liable for any errors or for incidental or consequential damages in connection with the furnishing, performance, or use of this manual or the examples herein. Consumer transactions in Australia and the United Kingdom: The above disclaimers and limitations shall not apply to Consumer transactions in Australia and the United Kingdom and shall not affect the statutory rights of Consumers. © Copyright Hewlett-Packard Company 1999. All rights reserved. Reproduction, adaptation, or translation of this manual is prohibited without prior written permission of Hewlett-Packard Company, except as allowed under the copyright laws. The programs that control this product are copyrighted and all rights are reserved. Reproduction, adaptation, or translation of those programs without prior written permission of Hewlett-Packard Co. is also prohibited. Portions of the programs that control this product may also be copyrighted by Microsoft Corporation, SystemSoft Corp., Phoenix Technologies, Ltd., and NeoMagic, Inc. See the individual programs for additional copyright notices. Microsoft, MS, MS-DOS, and Windows are registered trademarks of Microsoft Corporation. Pentium and the Intel Inside logo are U.S. registered trademarks of Intel Corporation. TrackPoint is a U.S. registered trademark of International Business Machines. All certifications may not be completed at product introduction. Check with your HP reseller for certification status. This equipment is subject to FCC rules. It will comply with the appropriate FCC rules before final delivery to the buyer. Hewlett-Packard Company Mobile Computing Division 19310 Pruneridge Ave. Cupertino, CA 95014, U.S.A.
Edition History
Edition 1 ........................ January 1999
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HP OmniBook 900
Contents
1. Product Information ..................................................................................................1-1
Features and Operation ................................................................................................................. 1-3 Turning the OmniBook On and Off....................................................................................... 1-4 Checking the Status of the OmniBook................................................................................... 1-5 Using Fn Hot Keys................................................................................................................. 1-6 Resetting the OmniBook........................................................................................................ 1-6 System Resources .................................................................................................................. 1-7 Specifications................................................................................................................................ 1-9 Internal Design............................................................................................................................ 1-12
2. Removal and Replacement ........................................................................................2-1
Removing the Battery (User-Replaceable) ................................................................................... 2-3 Removing a RAM Board (User-Replaceable) .............................................................................. 2-4 Removing the Hard Disk Drive (User-Replaceable) .................................................................... 2-5 Replacing Small Parts (User-Replaceable)................................................................................... 2-7 Removing the LCD Module (HP Authorized Service Providers Only)........................................ 2-8 Removing the Keyboard (HP Authorized Service Providers Only) ........................................... 2-10 Removing the CPU Module (HP Authorized Service Providers Only)...................................... 2-12 Removing the Display Assembly (HP Authorized Service Providers Only).............................. 2-14 Removing the Top Case (HP Authorized Service Providers Only)............................................ 2-16 Removing the Motherboard or Bottom Case (HP Authorized Service Providers Only) ............ 2-18 Removing the BIOS IC (HP Authorized Service Providers Only)............................................. 2-21 Removing Other Components (HP Authorized Service Providers Only)................................... 2-23
3. Troubleshooting and Diagnostics..............................................................................3-1
Troubleshooting............................................................................................................................ 3-2 Troubleshooting the Problem................................................................................................. 3-2 Verifying the Repair .............................................................................................................. 3-3 Suggestions for Troubleshooting ........................................................................................... 3-4 Diagnostic Tools......................................................................................................................... 3-12 OmniBook Diagnostic Program........................................................................................... 3-12 Power-On Self-Test ............................................................................................................. 3-17 Sycard PCCtest 450 CardBus Card (Optional).................................................................... 3-20 Desktop Management Interface (DMI)................................................................................ 3-21 BIOS Setup Utility............................................................................................................... 3-23
4. Replaceable Parts .......................................................................................................4-1 5. Reference Information ...............................................................................................5-1
Password Removal Policy ............................................................................................................ 5-1 Hewlett-Packard Display Quality Statement ................................................................................ 5-2
HP OmniBook 900
iii
Figures
Figure 1-1. OmniBook - Front View ....................................................................................................1-3 Figure 1-2. OmniBook - Side View .....................................................................................................1-3 Figure 1-3. OmniBook - Rear View .....................................................................................................1-3 Figure 1-4. Replaceable Module Diagram .........................................................................................1-12 Figure 2-1. Removing the Battery ........................................................................................................2-3 Figure 2-2. Removing a RAM Board ...................................................................................................2-5 Figure 2-3. Removing the Hard Disk Drive .........................................................................................2-6 Figure 2-4. Installing a Hard Drive in the Cover..................................................................................2-6 Figure 2-5. Removing the LCD Module ..............................................................................................2-9 Figure 2-6. Removing the Keyboard ..................................................................................................2-11 Figure 2-6. Removing the CPU Module.............................................................................................2-13 Figure 2-8. Removing the Display Assembly.....................................................................................2-15 Figure 2-9. Removing the Top Case...................................................................................................2-17 Figure 2-10. Removing the Motherboard ...........................................................................................2-19 Figure 2-11. Removing the BIOS IC..................................................................................................2-22 Figure 3-1. Basic Troubleshooting Steps .............................................................................................3-2 Figure 3-2. OmniBook Diagnostic Screens -- Basic and Advanced .................................................3-12 Figure 3-3. Serial and Parallel Loopback Connectors........................................................................3-14 Figure 4-1. Exploded View ..................................................................................................................4-2 Figure 4-2. Display Components..........................................................................................................4-5
Tables
Table 1-1. OmniBook 900 Models.......................................................................................................1-1 Table 1-2. Product Comparisons ..........................................................................................................1-2 Table 1-3. Activating Power Modes.....................................................................................................1-4 Table 1-4. Main Status Lights (Motherboard)......................................................................................1-5 Table 1-5. Keyboard Status Lights (Motherboard)...............................................................................1-5 Table 1-6. Fn Hot Keys ........................................................................................................................1-6 Table 1-7. System Interrupts ................................................................................................................1-7 Table 1-8. System Memory ..................................................................................................................1-7 Table 1-9. System Input/Output Addresses (100-3FF).........................................................................1-8 Table 1-10. DMA Channels .................................................................................................................1-8 Table 1-11. OmniBook 900 Specifications ..........................................................................................1-9 Table 1-12. OmniBook 900 Accessories............................................................................................1-11 Table 1-13. Functional Structure........................................................................................................1-13 Table 2-1. Removal Cross-Reference...................................................................................................2-1 Table 2-2. Required Equipment ...........................................................................................................2-2 Table 2-3. Recommended Screw Torques............................................................................................2-2 Table 2-4. RAM Board Replacement Part Numbers............................................................................2-4 Table 2-5. Hard Disk Drive Replacement Part Numbers .....................................................................2-5 Table 2-6. Replacing Small Parts (User-Replaceable) .........................................................................2-7 Table 2-7. Removing Display Components .......................................................................................2-24 Table 2-8. Removing Top Case Components.....................................................................................2-25 Table 2-9. Removing Bottom Case Components ...............................................................................2-25 Table 3-1. Scope of Diagnostic Tools ..................................................................................................3-4 Table 3-2. Troubleshooting Suggestions..............................................................................................3-5 Table 3-3. OmniBook Diagnostic Error Codes ..................................................................................3-14 Table 3-4. POST Terminal-Error Beep Codes ...................................................................................3-17 Table 3-5. POST Messages ................................................................................................................3-18
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HP OmniBook 900
Table 3-6. BIOS Setup Menus and Parameters ................................................................................. 3-23 Table 4-1. OmniBook Replaceable Parts ............................................................................................ 4-3 Table 4-2. Assembly-Component Breakdown..................................................................................... 4-6 Table 4-3. Accessory Replaceable Parts.............................................................................................. 4-6 Table 4-4. Part Number Reference ...................................................................................................... 4-7 Table 5-1. OmniBook 900 LCD Guidelines (TFT) ............................................................................. 5-3
HP OmniBook 900
v
Introduction
This service manual provides reference information for the HP OmniBook 900. It is intended to be used by HP-authorized service personnel in the installation, servicing, and repair of these products. The manual is designed self-contained. It is intended that you can follow this manual without having equipment available. The following table lists additional places where you can get supplementary information about OmniBook products.
Sources of OmniBook Information
Source HP External Web Address or Number http://www.hp.com/omnibook (http://www.europe.hp.com/omnibook, European mirror) http://partner.americas.hp.com http://www.hp.com.au Comments No usage restriction.
HP US Reseller Web HP Asia Pacific Channel Support Centre for DPSP Partners America Online CompuServe HP Bulletin Board Service HP First (automated fax)
Restricted to Authorized Resellers only. Restricted to DPSP Partners only.
Keyword: HP GO HP
(800) 333-1917 (801) 344-4809 (800) 544-9976 (800) 457-1762 (801) 431-1587 http://www.microsoft.com
HP Support Assist CD-ROM Microsoft Web
Call (800) 827-6364 for membership within the US. Call (800) 524-3388 for membership within the US. Refer to the latest Product Support Plan for non-US BBS numbers. US and Canada. Outside US and Canada. Reseller support number (enter outlet id number). US and Canada. Outside US and Canada. Information and updates for Windows operating systems.
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HP OmniBook 900
1
Product Information
The HP OmniBook 900 provides desktop-quality performance and expandability in a highly portable form. It uses high-performance component technologies that make it capable of serving as a desktop computer that you can conveniently take anywhere.
Table 1-1. OmniBook 900 Models
OmniBook Product * F1711x CPU ** Display Hard Drive Floppy Drive CD-ROM Drive None Standard RAM 32 MB
Pentium II 12.1-inch 4.3 GB 1.44 MB 300 MHz SVGA TFT (none) (F1472A) F1712x Pentium II 6.4 GB 366 MHz (F1707A) This table lists only base product configurations--custom configurations are not included. * For the products listed: "x" suffix means "N", "NT", or "NV" for Windows NT 4.0 installed (marketing distinction only), or "W", "WT", or "WV" for Windows 95/98 installed (marketing distinction only). ** Intel Mobile Pentium II processor.
HP OmniBook 900
Product Information
1-1
Table 1-2. Product Comparisons
Processor * OmniBook 900 OmniBook 7150 Intel Pentium II (366 or Intel Pentium II (300 300(PE) MHz). MHz). OmniBook 4150 Intel Pentium II (366, 333, or 300 MHz). OmniBook 2100 Pentium II (300, 266, or 233 MHz), or Pentium (233 or 200 MHz). 32 MB RAM on motherboard. Expandable to 160, 192, or 288 MB. 13.3-inch TFT XGA display, or 12.1-inch TFT or DSTN SVGA display. PCI local bus video. 128-bit graphics controller with 2 MB internal video RAM. Up to 64K colors (XGA), 16M colors (SVGA). Zoomed Video enabled. Windows 95, Windows 98, or Windows NT 4.0 preinstalled. DMI 2.0. HP TopTools 2.6 or 3.0. APM 1.2. ACPI compliant.
Memory
Display
32 MB RAM on motherboard. Expandable to 160 MB. 12.1-inch TFT SVGA display.
64 MB RAM in system slot. Expandable to 320 MB. 14.1-inch TFT XGA display.
128 or 64 MB RAM in slot. Expandable to 256 MB. 14.1-inch TFT XGA display.
Video
AGP video. 256-bit graphics controller with 2.5 MB internal video RAM. Up to 16M colors (XGA). Zoomed Video enabled.
Operating System
Desktop Management Interface APM 1.2. Power Management ACPI compliant. Power States On, Standby, Suspend, Hibernate, Off. *
Windows 95, Windows 98, or Windows NT 4.0 preinstalled. DMI 2.0. HP TopTools 3.0.
AGP video. 64-bit graphics controller with 4 MB external video RAM, 3D graphics acceleration. Up to 16M colors (XGA). Zoomed Video enabled. Windows 95, Windows 98, or Windows NT 4.0 preinstalled. DMI 2.0. HP TopTools 3.0. APM 1.2. ACPI compliant.
AGP video. 256-bit graphics controller with 2.5 MB internal video RAM. Up to 16M colors (XGA). Zoomed Video enabled.
Windows 95, Windows 98, or Windows NT 4.0 preinstalled. DMI 2.0. HP TopTools 3.0. APM 1.2. ACPI compliant.
On, Standby, Suspend, On, Standby, Suspend, On, Standby, Suspend, Hibernate, Off. Hibernate, Off. Hibernate, Off.
Intel Mobile Pentium or Mobile Pentium II processor.
This chapter describes · Features and operation (below). · Specifications (page 1-9). · Internal design (page 1-12).
1-2
Product Information
HP OmniBook 900
Features and Operation
The following three illustrations point out the main external features of the computer. They are followed by highlights of the computer's operation. For an internal, exploded view, see page 4-2.
Latch Microphone Keyboard status lights Power button Pointing stick Touch pad
AC adapter socket Click buttons (above and below the touch pad) External module bay connector PC Card slots PC Card eject buttons
Figure 1-1. OmniBook - Front View
PS/2 port System-off button Infrared port Audio jacks Hard disk drive Battery Speaker Main status lights
Figure 1-2. OmniBook - Side View
Kensington Serial lock slot port
Parallel port
Video out
USB port
Docking port
Kensington lock slot
Figure 1-3. OmniBook - Rear View
HP OmniBook 900
Product Information
1-3
Turning the OmniBook On and Off
· On. Press the blue power button to turn on the OmniBook. · Standby. The display turns off automatically if the computer is inactive for about 2 minutes. · Suspend. Click Start, Suspend (Windows 95) or press the blue power button briefly (about 1 second) to suspend activity when the OmniBook is on. When you turn on the computer, it resumes your previous work session. Closing the lid (for more than 2 seconds) also suspends the computer. · Hibernate. Press Fn+F12. This is like Off, except that your current work session is first saved to disk. When you turn on the computer, it reboots and restores your previous session. · Off. Click Start, Shut Down. If the OmniBook does not respond, press and hold the blue power button until the display shuts down. When you turn on the computer, it reboots. Unsaved data is lost.
Table 1-3. Activating Power Modes
Power Mode Standby Reduced-power/stopped state. Display is off. Everything is in a reduced-power state. Network devices are maintained. Your current work session continues at turn-on (any key or pointer action). Suspend Low-power/stopped state. Lower power state than Standby. Everything is off or in a low-power state. Network devices are off. Your previous work session resumes at turn-on. For plug-and-play operating systems, network connections resume at turn-on. To Enter Mode Press Fn+S (not Windows 98) or allow time-out. To Turn Back On Press any key or move a pointing device to display the current session ("Instant-On"). Press blue power button to display the current session ("Instant-On").
Hibernate No-power/stopped state. Session is saved on the hard disk. Everything is shut down. Computer reboots at turn-on and restores previous session and network connections (if plug-and-play). Off No-power/stopped state. Everything is shut down (battery continues charging if ac adapter is connected). Computer reboots at turn-on and restores network connections.
Press blue power button for about 1 second or click Start, Shut Down, Standby (Windows 98) or click Start, Suspend (Windows 95) or allow time-out. Press Fn+F12 or allow time-out.
Press blue power button to restart and restore the previous session. Press blue power button to restart with a new session.
Click Start, Shut Down or Press and hold the blue power button until the display shuts down.
1-4
Product Information
HP OmniBook 900
Checking the Status of the OmniBook
The main OmniBook status lights, located at the front-right edge of the display bezel at the top of the display, indicate power status and drive activity. (These lights are on the motherboard.)
Table 1-4. Main Status Lights (Motherboard)
Meaning Power mode Steady green light: OmniBook is running (On mode). Steady orange light: OmniBook is suspended (Suspend or Standby mode). No light: OmniBook is off (Off or Hibernate mode). Green and orange lights: OmniBook failed when resuming, requires reset. Drive access Green light: OmniBook is accessing the hard disk drive or a drive in the external module bay. Charging Steady green light: AC adapter is connected, battery is full or stopped charging. Blinking green light: AC adapter is connected, battery is charging. No light: AC adapter is not connected or battery is not present.
The keyboard status lights, located above the keyboard, indicate the states of the keyboard locks. (These lights are on the motherboard.)
Table 1-5. Keyboard Status Lights (Motherboard)
Meaning Caps Lock Caps Lock is active. Keypad Lock The embedded keypad is active (Fn+F8 or Fn held down). Num Lock must also be on for the numeric keys--otherwise, cursor control is active. Num Lock Num Lock is active. Keypad Lock must also be on to use the embedded keypad. Scroll Lock Scroll Lock is active.
In addition, the battery module has five lights that indicate its charge level. To view the lights, you have to remove the battery and press the pad on the back next to the connector. The number of lights that turn on indicates the charge.
HP OmniBook 900
Product Information
1-5
Using Fn Hot Keys
The Fn key combined with another key is a hot key--a shortcut key sequence for various system controls. For an external keyboard, CTRL+ALT is normally equivalent to the Fn key.
Table 1-6. Fn Hot Keys
Hot Key Fn + F1 Fn + F2 Fn + F5 Fn + F7 Fn + F8 Effect Decreases the display's brightness. Increases the display's brightness. Switches among the built-in display, an external display, and simultaneous displays. Toggles audio output on and off (mute). Toggles the embedded keypad on and off. Does not affect an external keyboard. If Num Lock is on, then the numeric functions are active--otherwise, cursor control is active. Enters Hibernate mode. Enters Suspend mode. Enters Standby mode (Windows 95, Windows NT) or Suspend mode (Windows 98). Toggles Scroll Lock on and off. Increases and decreases the sound volume.
Fn + F12 Fn + R Fn + S Fn + ScrLk Fn + UP ARROW Fn + DOWN ARROW
Resetting the OmniBook
1. Use a pen or a straightened paper clip to push the system-off button on the left side of the OmniBook. (The switch is on the motherboard.) or Press and hold the blue power button until the display shuts down. (The switch is on the motherboard.) 2. After the computer shuts down, press the blue power button to turn it back on.
Note The OmniBook can boot from a CD if all these conditions are true: · You have an OmniBook CD-ROM drive installed in the external module bay, · You have a bootable CD in the drive, such as the OmniBook Recovery CD, and · You select the CD-ROM drive as the boot device. You can do this during reboot by pressing ESC to cancel the OmniBook screen, then ESC to display the boot-device menu for a onetime selection.
1-6
Product Information
HP OmniBook 900
System Resources
The tables in this section show typical resource usage as set up by the OmniBook BIOS. Plug-andplay operating systems, drivers, and BIOS Setup settings may change some of the entries. To see other, non-default possibilities, use the BIOS Setup utility (see page 3-23), which lists port and audio device configurations in the System Devices menu.
Table 1-7. System Interrupts
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 System timer Keyboard Cascade IRQ 9 Free (or COM2 infrared port, if enabled) COM1 (serial port) Audio Floppy drive Video controller Real-time clock Video controller USB and CardBus - assigned by Windows driver Free Pointing device Numeric data processor Internal hard disk (primary IDE controller) Internal CD-ROM drive (secondary IDE controller)
Table 1-8. System Memory
00000 - 9FFFF System memory A0000 - BFFFF Video C0000 - CBFFF Video BIOS CC000 - DBFFF* Free** DC000*- FFFFF System BIOS * Approximate boundary. ** Valid uses for memory addresses CC000-DBFFF: Upper memory blocks (UMBs). PC card memory windows.
HP OmniBook 900
Product Information
1-7
Table 1-9. System Input/Output Addresses (100-3FF)
120-127 170-177 1F0-1F7 220-22F 376 378-37F 388-38B 3B0-3BB 3C0-3DF 3E0-3E1 3F0-3F5 3F6 3F7 3F8-3FF Audio Internal CD-ROM drive (secondary IDE controller) Internal hard disk (primary IDE controller) Audio Internal CD-ROM drive (secondary IDE controller) LPT1 (printer port) Audio Video adapter Video adapter PCMCIA controller Floppy controller Internal hard disk (primary IDE controller) Floppy controller COM1 (serial port)
Table 1-10. DMA Channels
0 1 2 3 4 5 6 7 Sound record Sound playback Floppy drive LPT1 (ECP parallel port) Cascade Free Free Free
1-8
Product Information
HP OmniBook 900
Specifications
The following tables list descriptions for the OmniBook and its accessories.
Table 1-11. OmniBook 900 Specifications
Physical Attributes Processor and Bus Architecture Notebook size: 11.8 x 8.8 x 1.26 in (30.0 x 22.5 x 3.2 cm). Notebook weight: 4 lb (1.8 kg). 366-MHz or 300(PE)-MHz Intel Mobile Pentium II processor. 1.6-V core, 2.5-V external, low-power processor. 32-KB (16-KB instruction, 16-KB data) L1 cache. 256-KB four-way set-associative L2 cache. 32-bit PCI bus. 12.1-inch diagonal 800x600 SVGA TFT display (800x600x262K colors). 256-bit NeoMagic MagicGraph graphics accelerator with 2.5-MB video RAM. Zoomed Video support for lower PC Card slot. 1x AGP graphics capability. Rechargeable 6-cell lithium ion battery with LED charge-level gauge (10.8 Vdc, 3.0 AH, 33 watt-hours). Battery life: up to 2.5 hours (varies with type of usage). Fast battery recharge: 80% in 1 hour, 100% in 1.5 hours. Low-battery warning. Suspend/resume capability. 60-watt ac adapter: 100 to 240 Vac (50 to 60 Hz) input, 19 Vdc, 3.16 A output. 6.4-GB or 4.3-GB removable hard drive. 1.44-MB floppy drive module for use in external module bay. Optional modules for use in external module bay: 24X CD-ROM drive module. LS-120 SuperDisk drive module. 2X DVD drive module. 32-MB RAM built in. One slot for RAM expansion up to 160 MB. 16-bit Sound Blaster Pro-compatible stereo sound. Built-in speaker. 3D-enhanced PCI bus audio with Zoomed Video support (lower slot). Built-in microphone. Line-in, headphone-out, and microphone-in. 87/88-key touch-type QWERTY keyboard with 101/102 key emulation. Embedded numeric keypad. 12 function (Fn) keys. Two pointing devices: pointing stick (TrackPoint technology licensed from IBM) and touch pad. FDD/IDE interface for external module bay. Universal serial bus (USB). 9-pin, 115,200-bps serial (16550 UART). 25-pin bi-directional ECP/EPP parallel. Video-out (Resolution: up to 1280×1024×256 colors. Refresh rate: 60 to 85 Hz.) Dual display. PS/2 keyboard/mouse. 4-Mbps IrDA-compliant infrared port. One Type III or two Type II 16-/32-bit PC Card slots (3.3- and 5-V support). CardBus enabled. External plug-in module bay for accessory modules. Optional port replicator, mini dock, and docking system.
Graphics
Power
Mass Storage
RAM Audio System
Keyboard and Pointing Device
Input/Output
Expandability
HP OmniBook 900
Product Information
1-9
Software
Security Features
Environmental Limits
Major ICs
Microsoft Windows 95/Windows 98, or Windows NT 4.0. Windows 95/Windows 98-compatible Plug-and-Play. Windows NT 4.0 and PC Card Plug-and-Play. Advanced Power Management (APM). DMI with HP TopTools. Adobe Acrobat Reader. Agaté Tioman for HP (Hot Swap). DiagTools. McAfee VirusScan. Online Reference Guide. OmniBook Recovery CD included. Centralized worldwide BIOS and driver update service User and administrator passwords. System, hard drive, and docking passwords. PC identification displayed at boot. DMI-accessible electronic serial number. Kensington MicroSaver lock slot. Operating temperature: 5 to 35 °C (41 to 95 °F). Operating humidity: 20 to 90 percent RH (5 to 35 °C). Storage temperature: 20 to 50 °C (4 to 122 °F). CPU: Intel Mobile Pentium II processor. South Bridge: PIIX4E. Video: NeoMagic MagicGraph NM2200 (NMG5). Audio: NeoMagic MagicGraph NM2200 (NMG5) and NeoMagic Audio NMA2. CardBus: TI PCI 1225. Keyboard controller: National PC87570. Super I/O: SMC 769.
1-10
Product Information
HP OmniBook 900
Table 1-12. OmniBook 900 Accessories
Accessory Memory F1456A F1457A F1622A Hard Drives F1707A Modules F1465A F1470A F1472A F1473A F1474A F1704A Description OmniBook 900 · · · · · · · · · · · · · · · · · · · · · · · · · · Compatibility 4150 2100/7100 · · · · · ·
32-MB SDRAM expansion module 64-MB SDRAM expansion module 128-MB SDRAM expansion module 6.4-GB internal hard disk drive DVD drive module (with DVD player card) LS-120 SuperDisk drive module Floppy drive module Floppy drive cable for external use 24X CD-ROM drive module External module bay
Power Options F1454A 60-watt ac adapter F1455A F1705A F1706A 8120-6312 8120-6313 8120-6314 8120-6316 8120-6317 8120-8367 8120-8373 8120-8452 8120-8699 Adapters F1469A PC Cards F1623A F1625A F1626A F1627A TCM3C589 Docks F1451A F1452A F1453A F1468A F1477A 75-watt auto/airline power adapter Lithium-ion battery Battery charger (external) Replacement power cord (Australia) Replacement power cord (U.S., Canada, Taiwan) Replacement power cord (Europe) Replacement power cord (Japan) Replacement power cord (India, South Africa) Replacement power cord (Argentina) Replacement power cord (People's Republic of China) Replacement power cord (Chile) Replacement power cord (Hong Kong,Singapore,U.K.) PS/2 Y adapter 10/100-Mbps Ethernet + 56-Kbps modem PC Card by Xircom 56-Kbps global modem PC Card by Xircom 10/100-Mbps Ethernet PC Card by 3Com 56-Kbps US modem PC Card by Xircom 10-Mbps Ethernet PC Card by 3Com Port replicator (tray: page 4-6) Mini dock (tray: page 4-6) Monitor stand (short) for F1451A and F1452A Docking module bay adapter Docking system and monitor stand (tall) (tray: page 4-6)
· · · · · · · · · · ·
· · · · · · · · · · ·
· · · · · · · · · ·
HP OmniBook 900
Product Information
1-11
Internal Design
The motherboard PCA is the central component of the OmniBook design. It plays a role in virtually all system functions. The CPU module and most other subsystems connect to the motherboard. The following figure shows the connections among the replaceable electrical modules. As a substitute for a functional block diagram, see the table on page 1-13--it lists the roles that the replaceable modules play in each of the functional subsystems.
LCD Module Top Case (microphone) Touch Pad External Module Bay
CPU Module RAM Board Fan
BIOS IC Motherboard PCA PCMCIA Socket PCMCIA Cards Speaker
Hard Disk Drive
Battery
The power switch and lid switch are contained on the motherboard. All external connections are made to the motherboard.
Keyboard (pointing stick)
Figure 1-4. Replaceable Module Diagram
1-12
Product Information
HP OmniBook 900
Table 1-13. Functional Structure
Bootup CPU module Motherboard BIOS IC Floppy disk module Hard disk drive CPU module Motherboard Motherboard RAM board Battery Motherboard AC adapter Motherboard LCD module Motherboard Hard disk drive Motherboard Floppy disk module Motherboard BIOS IC Keyboard Motherboard BIOS IC Keyboard Top case Motherboard Speaker Motherboard Motherboard Motherboard Motherboard Motherboard Motherboard Motherboard Motherboard PCMCIA socket Main processor. Primary system circuitry. Code for basic system functions. First source of disk-based startup code. Second source of disk-based startup code. Main processor, numeric data processor, L1 and L2 cache. Primary system circuitry. First 32 MB of RAM, video RAM. Changeable RAM. Power storage. AC adapter socket, power switch, lid switch, system-off switch, power supply, power control circuitry. AC-to-dc converter. Display/graphics controller, PCMCIA/zoomed video controller, video RAM, power converter for backlight. Display output, backlight. Hard disk controller. Hard disk mechanism. Floppy disk controller. Floppy disk mechanism. Keyboard controller. Keyboard BIOS. Key switches. Keyboard controller, pointing stick controller (PS/2 output). Keyboard BIOS. Pointing stick sensor. Touch pad sensor, controller (PS/2 output). Audio controller, audio decoder, speaker amplifier, headphone amplifier, zoomed video controller, external audio jacks, microphone. Speaker (mixed left and right channels). Keyboard controller, main LEDs, keyboard LEDs. I/O controller, serial connector. I/O controller, parallel connector. I/O controller, infrared transmitter/receiver. Keyboard controller, PS/2 processor, PS/2 connector. Bus controller (South Bridge), USB connector. Docking logic, docking connector. PCMCIA controller. PCMCIA connectors.
Processor Memory Power
Display
Hard disk Floppy drive Keyboard
Pointer
Audio
Status Serial Parallel Infrared PS/2 port USB Docking port PCMCIA
HP OmniBook 900
Product Information
1-13
2
Removal and Replacement
This chapter tells you how to remove and replace the following components and assemblies. The ones marked by · are user-replaceable.
Table 2-1. Removal Cross-Reference
· Battery (page 2-3) Bezel, display (page 2-24) · Bumper, display (page 2-7) Cable, display flex (page 2-24) Cable, display power (page 2-24) · Cap, pointing stick (page 2-7) Case, bottom (page 2-18) Case, display (page 2-24) · Case, HDD kit (page 2-5) Case, top (page 2-16) · Cover, display screw (page 2-7) · Cover, hinge (page 2-7) · Cover, keyboard screw (page 2-7) CPU module (page 2-12) · Door, HDD (page 2-7) Door, module bay connector (table starting on page 2-25) · Drive, hard disk (page 2-5) Fan (table starting on page 2-25)
· Foot (page 2-7) Heatsink (table starting on page 2-25) Hinge, display (page 2-24) IC, BIOS (page 2-21) Insulator, bottom case (table starting on page 2-25) Keyboard (page 2-10) Latch, display (page 2-24) LCD module (page 2-8) Lens, infrared (table starting on page 2-25) Overlay, serial number (page 2-20) Pads, thermal (table starting on page 2-25) PCA, motherboard (page 2-18) Socket, PCMCIA (table starting on page 2-25) Speaker (table starting on page 2-25) Support, hinge left (table starting on page 2-25) Support, hinge right (table starting on page 2-25) Support, touch-pad (page 2-25) Touch pad (page 2-25)
Caution
Always provide proper grounding when performing repairs. Without proper grounding, an electrostatic discharge may damage the OmniBook and its components.
Notes Reassembly steps are the reverse of the removal steps. Reassembly notes are included at the end of each section below. Symbols like this throughout this chapter show approximate full-size screw outlines. You can use them to verify the sizes of screws before you install them. Installing a wrong-size screw can damage the unit. (The symbol at the left represents an M2.5×5mm T-head screw.)
HP OmniBook 900
Removal and Replacement
2-1
Table 2-2. Required Equipment
· · · · · · ·
Small Phillips screwdriver (#1), preferably magnetized. Fine Phillips screwdriver (#0). 4-mm thin-wall hex driver (or 5/32 inch). Small plastic blade for prying, such as an angled plastic tweezers. Pointed knife or probe. Small flat-blade screwdriver. IC (PLCC) removal tool (similar to OK Industries EX-5).
Table 2-3. Recommended Screw Torques
Screw Thread Size M1.4 M2 M2.5 (45 mm long) except those in next line M2.5 (45 mm long) for HDD case, PCMCIA socket M2.5 (8 mm long) M3 except those in next line M3 for HDD case Torque (kgf·cm) 0.9 1.2 1.5 2.0 3.0 3.5 2.0 2.5 3.5 4.0 4.0 4.5 2.0 2.5 Torque (lbf·in) 0.8 1.0 1.3 1.7 2.6 3.0 1.7 2.2 3.0 3.4 3.4 3.9 1.7 2.2
2-2
Removal and Replacement
HP OmniBook 900
Removing the Battery
(User-Replaceable)
Required Equipment
· None.
Removal Procedure
1. Unplug the ac adapter, if present. 2. Slide the battery's front panel to the right. 3. Pull the battery out of the bay.
Figure 2-1. Removing the Battery Reassembly Notes
· Make sure the front panel of the battery is open before inserting the battery.
HP OmniBook 900
Removal and Replacement
2-3
Removing a RAM Board
(User-Replaceable)
Table 2-4. RAM Board Replacement Part Numbers
Description RAM board, 32-MB SDRAM RAM board, 64-MB SDRAM RAM board, 128-MB SDRAM Part Number 1818-7413 1818-7414 1818-7549 Exchange Part Number F1456-69001 F1457-69001 F1622-69001
Caution
Handle the RAM board only by its edges and provide proper grounding. Otherwise, you may damage the board due to electrostatic discharge. Required Equipment
· Small Phillips screwdriver.
Removal Procedure
1. Unplug the ac adapter, if present, and remove the battery. 2. Put your finger above the F8 key and slide the keyboard-screw cover to the left about 3 mm (1/8 inch)--then lift off the cover. 3. Remove the two screws holding the keyboard above the F1 and HOME keys. If your screwdriver has a fat shaft, protect or remove the right hinge cover. 4. Lift up the keyboard tab above the F1 key about 10 mm (1/2 inch), then free the snap at the center of the back edge. 5. Slide the keyboard toward the display about 5 mm (1/4 inch), then fold the keyboard forward onto the front of the top case.
Warning
Do not touch the heatsink until it has cooled. It could be hot if the computer was running recently.
6. Release the two latches at the sides of the RAM board, so the free edge of the board pops up. 7. Pull the board out of the connector.
2-4
Removal and Replacement
HP OmniBook 900
Keyboard-screw cover Screw, M2.5×4mm (2)
RAM board
Figure 2-2. Removing a RAM Board Reassembly Notes
· Insert the RAM board into the connector at about a 30° angle until it is fully inserted. Then press down at both sides until both latches snap closed. · Fold the keyboard back into place. Slip its front tabs into the slots, then snap the back edge into place. · Push the keyboard toward the back as you tighten the two screws. This helps engage the tab at the back-center of the keyboard.
Removing the Hard Disk Drive
(User-Replaceable)
Exchange Information When returning a bad hard disk drive to HP, describe the symptoms on a piece of paper and attach it to the part--do not use tape. Table 2-5. Hard Disk Drive Replacement Part Numbers
Description Part Number Exchange Part Number F1711-69100 F1711-69101
0950-3409 Drive, hard disk (4.3GB, 9.5mm, IBM) * 0950-4332 Drive, hard disk (6.4GB, 9.5mm, IBM) * * These hard drives are the preferred drives at the time of publication. Drives shipped in units are subject to change without notice. For current information about preferred and approved drives for these products, see the latest versions of service notes HDD4G-01 and HDD6G-01.
Required Equipment
· Small Phillips screwdriver.
Removal Procedure
1. Unplug the ac adapter, if present, and remove the battery. 2. Turn the unit bottom side up and remove the hard drive screw from the bottom case.
HP OmniBook 900
Removal and Replacement
2-5
3. Open the hard drive door, then pull out the hard drive by its plastic tab.
Screw, M2.5×5mm
Figure 2-3. Removing the Hard Disk Drive
4. If you are installing a new hard drive that does not have a cover, you can remove the cover parts from the old hard drive: · Remove the two screws from the case, then lift the plastic tab and remove the plastic cover and metal shield from the hard disk drive. · Carefully pry the connector off the end of the hard disk drive. Work alternately at each end so that the connector slides off evenly.
Screw, M3×4mm HDD cover kit
Hard disk drive
Figure 2-4. Installing a Hard Drive in the Cover Reassembly Notes
Caution
Do not cover the vent hole in the top surface of the hard drive or in the case. If you cover the hole, the hard drive could fail prematurely.
· The small plastic tabs on the connector face the top of the drive, and the metal shield fits behind the tabs.
2-6
Removal and Replacement
HP OmniBook 900
Important · If you are installing a new hard drive, create a Hibernate partition on the drive before loading any software--see the steps below. Creating a Hibernate Partition
1. Connect an external module bay and CD-ROM drive to the OmniBook. If you do not have an OmniBook CD-ROM module or external module bay, you must attach another type of CD-ROM drive, connect a floppy drive (in an external bay or with a parallel floppy cable), and create a Support Utility floppy disk. To create the disk, on any computer that has a CD-ROM drive, insert a formatted floppy disk in the floppy drive and run makesupp from the \Omnibook\Drivers\Hputils directory on the OmniBook 900 Recovery CD. See the readme file on the disk for additional instructions about setting up drivers for the CD-ROM drive. 2. Insert the Recovery CD in the CD-ROM drive. If the Support Utility disk is needed, insert it in the floppy drive. 3. Reboot the computer. If you are using an OmniBook CD-ROM drive, press ESC during reboot to cancel the OmniBook screen, ESC to display the boot-device menu, then select the CD-ROM drive as the boot device. 4. When prompted, select "Create Hibernate Partition." We recommend that you create a partition the same as the default option.
Replacing Small Parts
(User-Replaceable)
The following small parts are user-replaceable.
Table 2-6. Replacing Small Parts (User-Replaceable)
Part Bumper, display (upper) Cap, pointing stick Cover, display screw (lower) Cover, hinge Replacement Procedure Insert a small flat-blade screwdriver under the bumper and pry it loose. To replace, firmly press the adhesive side of the bumper into the recess. Pull the cap off the pointing stick. Insert a small flat-blade screwdriver under the cover and pry it loose. To replace, firmly press the adhesive side of the cover into the recess. Put your finger above the F8 key and slide the keyboard-screw cover to the left about 3 mm (1/8 inch)--then lift off the cover. Open the display fully. Push in at the bottomfront of the cover to unsnap it from the top case. Put your finger above the F8 key and slide the keyboard-screw cover to the left about 3 mm (1/8 inch)--then lift off the cover. Open the door about 45° and flex the door until one side tab releases. Insert a small flat-blade screwdriver under the foot and pry it loose. To replace, firmly press the adhesive side of the foot into the recess.
Cover, keyboard screw Door, hard disk Foot
HP OmniBook 900
Removal and Replacement
2-7
Removing the LCD Module
(HP Authorized Service Providers Only)
Exchange Information When returning a bad LCD module to HP, describe the symptoms on a piece of paper and attach it to the part--do not use tape. Required Equipment
· Small Phillips screwdriver. · Small flat-blade screwdriver. · Pointed knife or probe.
Removal Procedure
1. Unplug the ac adapter, if present, and remove the battery. 2. On the display bezel, remove the two upper bumpers and two lower screw covers (using a pointed knife or probe), then remove the four screws. 3. Along the top of the display, pull the bezel upward, toward the edge of the case, until the snaps release. 4. Starting at the top corners, repeat along the left and right sides, pulling outward to release the left and right edges. 5. Lift the top of the bezel away from the case about 7 cm (3 inches). The snaps along the bottom of the bezel should release. 6. At the top-right corner of the LCD module, unplug the LCD power wires from the power cable. 7. Remove the four screws holding the LCD module. 8. Lift up the right edge of the LCD module about 90°. 9. Using a small flat-blade screwdriver, insert the tip under the narrow end of the flex cable connector--not the wide end--and twist the screwdriver to release the connector from the LCD module.
2-8
Removal and Replacement
HP OmniBook 900
Bumper (oval)
Screw cover
Screw, M3×6mm Screw, M3×4mm Bezel
LCD module
LCD flex cable
Display case Power cable
Figure 2-5. Removing the LCD Module Reassembly Notes
· Make sure the LCD module and flex cable have small foam pads present to ensure good connections:
À Two pads on the back of the LCD module on the internal connections near the top-left and
bottom-left corners. If a pad is missing, replace the LCD module.
À One pad on the LCD flex cable behind the connector that plugs into the LCD module. If the
pad is missing, replace the flex cable.
HP OmniBook 900
Removal and Replacement
2-9
Removing the Keyboard
(HP Authorized Service Providers Only)
Required Equipment
· Small Phillips screwdriver. · Probe or tweezers.
Removal Procedure
1. Unplug the ac adapter, if present, and remove the battery. 2. Put your finger above the F8 key and slide the keyboard-screw cover to the left about 3 mm (1/8 inch)--then lift off the cover. 3. Remove the two screws holding the keyboard above the F1 and HOME keys. If your screwdriver has a fat shaft, protect or remove the right hinge cover. 4. Lift up the keyboard tab above the F1 key about 10 mm (1/2 inch). If necessary, free the snap at the center of the back edge. 5. Slide the keyboard toward the display about 5 mm (1/4 inch), then fold the keyboard forward onto the front of the top case.
Warning
Do not touch the heatsink until it has cooled. It could be hot if the computer was running recently.
6. Release the pointing stick flex cable from the motherboard. 7. Release the keyboard flex cable from the motherboard, then remove the keyboard.
2-10
Removal and Replacement
HP OmniBook 900
Keyboard-screw cover
Screw, M2.5×4mm
Keyboard
Keyboard flex cable Pointing stick flex cable
Figure 2-6. Removing the Keyboard Reassembly Notes
· To connect the flex cables, lay the keyboard upside-down on the front section of the top case. · Fold the keyboard back into place. Slip its front tabs into the slots, then snap the back edge into place. · Push the keyboard toward the back as you tighten the two screws. This helps engage the tab at the back-center of the keyboard.
HP OmniBook 900
Removal and Replacement
2-11
Removing the CPU Module
(HP Authorized Service Providers Only)
Required Equipment
· Small Phillips screwdriver. · Small plastic blade for prying, such as an angled plastic tweezers.
Removal Procedure
Warning
Do not touch the heatsink until it has cooled. It could be hot if the computer was running recently.
1. Unplug the ac adapter, if present, and remove the battery. 2. Remove the keyboard (page 2-10)--but you don't have to release the flex cables. 3. Remove the eight screws from the heatsink and lift off the heatsink.
Caution
Do not spin the fan blade with your finger. Pressure on the fan blade can damage the bearings.
Caution
In the next step, follow these precautions to prevent damage to the CPU connectors: · Use only a non-metallic tool for releasing the CPU module. A metal tool may damage the motherboard. · To release the CPU module, insert the non-metallic blade under the CPU module and twist it against the motherboard.
Non-metallic tool.
Pry up at these two places.
· Do not raise the front end or the CPU module higher than the back end during removal. To reinstall the CPU assembly, see the precautions under "Reassembly Notes."
4. At the side of the CPU module near the back-right corner, pry up the corner of the CPU module about 1-2 mm. Then pry up the back-left corner. Lift off the CPU module.
2-12
Removal and Replacement
HP OmniBook 900
Screw, M2×5mm (8)
Heatsink CPU module
Note: Do not put screws in these two holes.
CPU connector
Figure 2-7. Removing the CPU Module Reassembly Notes
Caution
Follow these precautions while installing the CPU module to prevent damage to the CPU connectors: · Place the CPU module on the connector carefully. Use the screw holes as a guide. · Place your fingers on top of the CPU module above the left and right ends of the connector. Do not push at other locations. · Press firmly at the left end while holding down the right--until the left engages. Then press down the right down while holding the left. · Press firmly until the CPU module seats in the connector--you should feel a slight click. Install or replace thermal pads on the heatsink that are missing or damaged. Do not install screws in the middle area of the heatsink. The only screws in the CPU area are at the four corners of the CPU module.
HP OmniBook 900
Removal and Replacement
2-13
Removing the Display Assembly
(HP Authorized Service Providers Only)
Required Equipment
· Small Phillips screwdriver.
Removal Procedure
1. Unplug the ac adapter, if present, and remove the battery. 2. Remove the keyboard (page 2-10). 3. Open the display fully and remove the covers from the display hinges. Push in at the bottom-front of the covers. 4. Unplug the display power wires from the motherboard near the right hinge. Free the wires from the notch in the top case. 5. Remove the two screws from the end of the LCD flex cable and unplug the cable from the motherboard. 6. Close the display and turn over the computer. 7. Remove the two screws from the back corners of the bottom case. 8. Open the display about 90°, then lift if off.
2-14
Removal and Replacement
HP OmniBook 900
Hinge covers (2)
Display power cable Screw, M2.5×4mm Display flex cable
Screw, M2.5×8mm
Figure 2-8. Removing the Display Assembly Reassembly Notes
· The flex cable wraps around the post only about 1/2 turn. · Insert the display power wires into the notch in the top case before installing the hinge cover.
HP OmniBook 900
Removal and Replacement
2-15
Removing the Top Case
(HP Authorized Service Providers Only)
Required Equipment
· Small Phillips screwdriver.
Removal Procedure
1. Unplug the ac adapter, if present, and remove the battery. 2. Remove these additional assemblies: · Hard disk drive (page 2-5) · Keyboard (page 2-10). · Display assembly (page 2-14). 3. Remove the eight screws from the heatsink and lift off the heatsink. (M2x5)
Caution
Do not spin the fan blade with your finger. Pressure on the fan blade can damage the bearings.
4. Unplug the microphone cable from the motherboard near the back. 5. Unplug the touch pad flex cable from the motherboard near the front. 6. On the bottom of the unit, remove the five screws from the front half of the case. 7. On the top of the unit, remove the three screws along the back of the top case. 8. Remove the six screws holding the top case to the motherboard and bottom case. 9. Near the docking connector, press down on the inner edge of the top case and lift the back edge until two snaps release in that area. 10. Near the right hinge area, push the top case toward the rear and lift the back edge until the top case releases from the right hinge support. 11. Hold the front of the bottom case with your thumbs. Lift the back of the top case about 5 mm (2 inches), then pull it forward with your fingers. Pull and work the top case until the middle snap releases. The left hinge support comes off with the top case. The right hinge support stays in the bottom case.
2-16
Removal and Replacement
HP OmniBook 900
Screw, M2×5mm (8)
Heatsink
Note: Do not put screws in these two holes. Screw, M2.5×8mm
Screw, M2.5×5mm
Microphone cable Touch pad cable
Top case
Screw, M2.5×8mm Screw, M2.5×5mm
Figure 2-9. Removing the Top Case Reassembly Notes Note: Installing a New Top Case · Transfer the following items from the old top case to the new one: Touch pad and support. Left hinge support. · Press down on the support plate while sliding it into place. Make sure the support is held down at its left and right edges. Check the action of the click buttons before installing the top case.
· Engage the tab at the front of the top case, then lower the it onto the bottom case. · It may be easier to plug in the touch pad flex cable while you are lowering the top case onto the bottom case--rather than waiting until after the top case is fully installed.
HP OmniBook 900
Removal and Replacement
2-17
Removing the Motherboard or Bottom Case
(HP Authorized Service Providers Only)
Exchange Information When returning a bad motherboard to HP, describe the symptoms on a piece of paper and attach it to the part--do not use tape. Required Equipment
· Small Phillips screwdriver. · 4-mm thin-wall hex driver (or 5/32 inch). If necessary, grind the sides of a standard driver.
Removal Procedure
1. Unplug the ac adapter, if present, and remove the battery. 2. Remove these additional assemblies: · Hard disk drive (page 2-5). · Keyboard (page 2-10). · Display assembly (page 2-14). · CPU module (page 2-12). · Top case (page 2-16). 3. Remove the screw holding the right hinge support near the back-right corner, then lift out the support. 4. Remove the screw holding the front-left corner of the motherboard. 5. Unplug the speaker wire from the front of the motherboard. 6. Unplug the fan wire from the left side of the motherboard. 7. Remove the two screws from the PCMCIA socket. 8. Unplug the PCMCIA socket flex cable from the motherboard and lift out the socket. 9. Remove the four hex standoffs in the CPU area. 10. Lift the front of the motherboard about 7 cm (3 inches), then slide the motherboard forward until it comes out of the bottom case.
2-18
Removal and Replacement
HP OmniBook 900
Screw, M2.5×4mm
Standoff, M2×9mm PCMCIA socket Motherboard
Screw, M2.5×8mm Right hinge support Screw, M2.5×4mm
Bottom case
Speaker cable Fan cable
Figure 2-10. Removing the Motherboard Reassembly Notes Note: Installing a New Motherboard · If a RAM board is present, transfer it from the old motherboard to the new one: · Reprogram the BIOS IC--see the note below. · Store the serial number electronically in the new motherboard--see the steps below.
Note: Installing a New Bottom Case · Transfer these parts from the old bottom case to the new one: HDD door and infrared lens. Module bay door. (If the door does not stick to the case, the motherboard will hold it.) Speaker. (If the covering is not reusable, install a new speaker.) Fan. (Do not press or spin the fan blade with your finger.) Mylar insulator (inside the bottom case). · Install the original serial number label and a new overlay--see the steps below if you have to make a new serial number label.
HP OmniBook 900
Removal and Replacement
2-19
· When lowering the motherboard into the bottom case, make sure the audio jack grounding tabs do not catch on the bottom case. · Make sure the speaker and fan wires are not trapped under the motherboard.
Note If you installed a new motherboard with a new BIOS IC, the IC contains only enough basic programming to boot the OmniBook. After installing the motherboard, you must reprogram the IC. Hewlett-Packard prefers that you program the IC with the latest BIOS. You can download it from the OmniBook website (see page vi)--follow the directions provided. Storing the Serial Number Electronically
1. Exit Windows and boot to a DOS prompt. 2. Run ESN.EXE from one of these sources:
On a factory software installation, change to the \Omnibook\Drivers\Hputils directory and type esn at the prompt. Otherwise, copy \Omnibook\Drivers\Hputils\Esn.exe from the OmniBook 900 Recovery CD, then run it on the OmniBook.
3. Store the serial number:
If you are prompted for the serial number, type the serial number shown on the bottom of the case. If a serial number has already been stored, you must call an HP support center to change it.
Installing a New Serial Number Label
If you do not have a master file that creates serial number labels, get a copy from the Reseller website (see page vi) under Product Support Information in the Service and Support Library. 1. Using any PC connected to a laser printer, open the master serial label file, enter the serial number and product number from the old serial label, and print the new label on plain white paper. The new label does not have barcodes. 2. Carefully cut out the new serial label just inside the border and place it into the inner recess in the bottom case. The bottom of the label goes toward the front of the case. 3. While holding the paper label in place, attach a serial label overlay into the outer recess. It covers and protects the serial label.
2-20
Removal and Replacement
HP OmniBook 900
Removing the BIOS IC
(HP Authorized Service Providers Only)
Note A replacement BIOS IC contains only enough basic programming to boot the OmniBook. After installing the IC, you must reprogram it. Hewlett-Packard prefers that you program the IC with the latest BIOS. You can download it from the OmniBook website (see page vi)--follow the directions provided. Required Equipment
· Small Phillips screwdriver. · IC (PLCC) removal tool (similar to OK Industries EX-5).
Removal Procedure
Caution
Remove all power before removing or installing the BIOS IC. Otherwise, the IC could be damaged.
1. Unplug the ac adapter, if present, and remove the battery. 2. Put your finger above the F8 key and slide the keyboard-screw cover to the left about 3 mm (1/8 inch)--then lift off the cover. 3. Remove the two screws holding the keyboard above the F1 and HOME keys. If your screwdriver has a fat shaft, protect or remove the right hinge cover. 4. Lift up the keyboard tab above the F1 key about 10 mm (1/2 inch), then free the snap at the center of the back edge. 5. Slide the keyboard toward the display about 5 mm (1/4 inch), then fold the keyboard forward onto the front of the top case.
Warning
Do not touch the heatsink until it has cooled. It could be hot if the computer was running recently.
6. Use an IC removal tool to remove the BIOS IC from its socket.
HP OmniBook 900
Removal and Replacement
2-21
IC removal tool
Figure 2-11. Removing the BIOS IC Reassembly Notes
Caution
· Align the IC with the slot in the socket. The IC is keyed to fit correctly. If you insert the IC backward, the IC or motherboard could be damaged.
· Press down firmly on the IC with your thumb to ensure a proper connection. · Fold the keyboard back into place. Slip its front tabs into the slots, then snap the back edge into place. · Push the keyboard toward the back as you tighten the two screws. This helps engage the tab at the back-center of the keyboard. · Reprogram the IC by programming the BIOS--see the note above.
2-22
Removal and Replacement
HP OmniBook 900
Removing Other Components
(HP Authorized Service Providers Only)
Required Equipment
· Small Phillips screwdriver. · Pointed knife or probe (for display components). · Small flat-blade screwdriver (for display components). · Fine Phillips screwdriver (for display latch only). · 4-mm thin-wall hex driver (or 5/32 inch) (for bottom case components). · Small plastic blade for prying, such as an angled plastic tweezers (for bottom case components).
Removal Procedure
1. Unplug the ac adapter, if present, and remove the battery. 2. Remove the additional assemblies and follow the special steps indicated in the tables below. Components are separated into these groups: · Display components (page 2-24). · Top case components (page 2-25). · Bottom case components (page 2-25).
HP OmniBook 900
Removal and Replacement
2-23
Table 2-7. Removing Display Components
Component Bezel, display Cable, display flex Keyboard (page 2-10). Display (page 2-14). LCD module (page 2-8). Removal Procedures Additional Steps (See figure on page 4-5) Remove the display bezel (see page 2-8). 1. Unsnap the flex cable tube from the display case. 2. Remove the screw holding the left hinge arm and release the flex cable grounding strap. Reassembly Notes: The grounding strap goes between the left hinge arm and the display case. It is held by the hinge screw. The flex cable wraps around the tube only about 1/2 turn. 1. Remove the two hinge covers. 2. Remove the display bezel (see page 2-8). 3. Unplug the power cable from the LCD module wires. 4. Unplug the power cable from the motherboard. Reassembly Notes: Insert the display power cable into the notch in the top case before installing the hinge cover. 1. Remove the screws holding the hinge arms, then lift out the hinges. 2. Unsnap the flex cable tube from the display case. Lift out the flex cable. 3. Remove the two screws holding the display latch, then lift out the latch. Reassembly Notes: Install the display latch and other components into the new display case. 1. Remove the display bezel (see page 2-8). 2. Remove the screw holding the hinge arm, then lift out the hinge. Reassembly Notes: Insert the hinge fully into the case before installing the screw. 1. Remove the display bezel (see page 2-8). 2. Remove the two screws holding the latch, then lift out the latch.
Cable, display power
Keyboard (page 2-10).
Case, display
Keyboard (page 2-10). Display (page 2-14). LCD module (page 2-8).
Hinge
Keyboard (page 2-10). Display (page 2-14).
Latch, display
LCD module
See page 2-8.
2-24
Removal and Replacement
HP OmniBook 900
Table 2-8. Removing Top Case Components
Component Case, top Keyboard Support, touch-pad Removal Procedures See page 2-16. See page 2-10. Hard drive (page 2-5). Keyboard (page 2-10). Display (page 2-14). Top case (page 2-16). 1. Remove the screw holding the support plate to the top case. 2. Slide the support plate to the side and lift it out. Reassembly Notes: Make sure the touch pad is seated properly before installing the support plate. Press down on the support plate while sliding it into place. Make sure it is held down at the left and right edges. Check the action of the click buttons before installing the top case. 1. Remove the screw holding the support plate to the top case. 2. Slide the support plate to the side and lift it out. 3. Lift out the touch pad and its flex cable. Reassembly Notes: Make sure the touch pad is seated properly before installing the support plate. Press down on the support plate while sliding it into place. Make sure it is held down at the left and right edges. Check the action of the click buttons before installing the top case. Additional Steps (See figure on page 4-2)
Touch pad
Hard drive (page 2-5). Keyboard (page 2-10). Display (page 2-14). Top case (page 2-16).
Table 2-9. Removing Bottom Case Components
Component Case, bottom CPU module Door, module bay connector Removal Procedures See page 2-18. See page 2-12. Hard drive (page 2-5). Keyboard (page 2-10). Display (page 2-14). CPU (page 2-12). Top case (page 2-16). Motherboard (page 2-18). Keyboard (page 2-10). Peel the rubber door from the bottom case. Reassembly Notes: Position the new door in the center of the opening before sticking it onto the bottom case. Additional Steps (See figure on page 4-2)
Fan
Heatsink
Keyboard (page 2-10).
Caution: Do not spin the fan blade with your finger. Pressure on the fan blade can damage the bearings. 1. Remove the eight screws from the heatsink and lift off the heatsink. 2. Remove the two screws holding the fan. 3. Unplug the fan cable from the motherboard and lift out the fan. Reassembly Notes: The opening in the side of the fan faces the vent in the bottom case. Remove the eight screws from the heatsink and lift off the heatsink. Reassembly Notes: Install or replace thermal pads on the heatsink that are missing or damaged.
IC, BIOS
See page 2-20.
HP OmniBook 900
Removal and Replacement
2-25
Component Insulator, bottom case
Lens, infrared
Pads, thermal
Removal Procedures Hard drive (page 2-5). Keyboard (page 2-10). Display (page 2-14). CPU (page 2-12). Top case (page 2-16). Motherboard (page 2-18). Hard drive (page 2-5). Keyboard (page 2-10). Display (page 2-14). Top case (page 2-16). Keyboard (page 2-10).
Additional Steps (See figure on page 4-