HP Book 900 manual Reassembly Notes

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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 and keyboard layout 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.) PCMCIA doors, if present (see the figure below).

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). CPU support (OmniBook 900B only).

Install the original serial number label and a new overlay—see the steps below if you have to make a new serial number label.

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.

Note

For an OmniBook 900 with a 12-inch display and serial number before TW92500000, if you must replace the motherboard or bottom case, check whether you must replace additional parts:

If the bottom case has a large blue pad that covers the bottom of the hard disk slot, replace just the bad part.

If the bottom case does not have such a pad in the hard disk slot, it is an old bottom case, and you should replace the top case, bottom case, and install a HDD bracket above the hard disk slot. (Service note 900-14.)

2-22 Removal and Replacement

HP OmniBook 900

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Contents HP OmniBook Edition History Contents Figures TablesHP OmniBook Source IntroductionSources of OmniBook Information Address or NumberOmniBook 900 Models Product Comparisons Processor OmniBookMemory Display Features and Operation OmniBook Front ViewActivating Power Modes Turning the OmniBook On and OffChecking the Status of the OmniBook Main Status Lights MotherboardKeyboard Status Lights Motherboard Fn Hot Keys Using Fn Hot KeysResetting the OmniBook Hot KeySystem Resources System InterruptsSystem Memory System Input/Output Addresses 100-3FF 10. DMA ChannelsSpecifications 11. OmniBook 900 SpecificationsOnline Reference Guide 12. OmniBook 900 Accessories Accessory Description OmniBook Compatibility Docks900B 900† 4150 2100/7100 Replaceable Module Diagram Internal Design13. Functional Structure Docking portRemoval and Replacement Removal Cross-ReferenceScrew Thread Size M1.4 Required EquipmentRecommended Screw Torques Torque kgfcm Torque lbfinRemoving the Battery Removal ProcedureReassembly Notes Installing a Battery PanelPart Number RAM Board Replacement Part NumbersRemoving a RAM Board Exchange Part NumberHard Disk Drive Replacement Part Numbers Removing the Hard Disk DriveExchange Information Removing the Hard Disk Drive Creating a Hibernate Partition Replacing Small Parts User-Replaceable Replacement ProcedureReplacing Small Parts Cover, keyboard screw Door, hard disk FootRemoving the LCD Module Display Component CompatibilityRemoving the LCD Module Removing the Keyboard Removing the Keyboard Reassembly Notes Removing the CPU Module Removing the CPU Module Reassembly Notes Removing the Display Assembly Removing the Display Assembly Reassembly Notes Removing the Top Case 10. Removing the Top Case Reassembly Notes Removing the Motherboard or Bottom Case 11. Removing the Motherboard Reassembly Notes Installing a New Serial Number Label Removing the Bios IC 13. Example of Serial Number Label14. Removing the Bios IC Reassembly Notes Removing Other Components Removing Display Components Cable, display power Case, displayHinge Latch, display LCD module Removal Procedures Component Bezel, display Cable, display flexRemoving Top Case Components 10. Removing Bottom Case ComponentsSupport, hinge left Removal Procedures Component HeatsinkComponent Support, hinge right Removal Procedures Troubleshooting and Diagnostics Troubleshooting Troubleshooting the ProblemVerifying the Repair Suggestions for Troubleshooting Scope of Diagnostic ToolsTroubleshooting Suggestions SymptomStartup Repair Center Likely Causes Power/BatteryCall Center Suggestions Repair Center CommentsWhite display Erratic display Symptom Keyboard Pointing stick Call Center SuggestionsSerial/Parallel AC adapter MiscellaneousAccessories Diagnostic Tools OmniBook Diagnostic ProgramCreating a Diagnostic Floppy Disk Running the Diagnostic Test Serial number Audio deviceOmniBook Diagnostic Error Codes Code Suggestions System TestsHard Disk Tests Video Tests Acpi Tests Power-On Self-Test Post Terminal-Error Beep CodesPost Messages System battery is dead Replace and run Setup Message DescriptionEntering Setup Sycard PCCtest 450 CardBus Card Optional Lower slot PCT450 -b69 -0Using the DMI Interface Installing the DMI PackageUninstalling the DMI Package Desktop Management Interface DMIContents of the DMI Package Bios Setup Menus and Parameters Bios Setup UtilityRunning the Bios Setup Utility Main Menu DefaultSystem Devices Menu Default Security Menu DefaultOB 900B On OB 900† Off Power MenuBoot Menu Default Exit MenuReplaceable Parts Exploded View OmniBook Replaceable Parts IC, Bios Exchange User Part Number ReplExchange Part Number User Repl OmniBook 900B 900† Display Components Assembly-Component Breakdown Accessory Replaceable PartsReplaceable Parts HP OmniBook Part Number Reference Part Number ExchangeDescription User OmniBook Repl 900B 900† Yes HP OmniBook Replaceable Parts Replaceable Parts HP OmniBook Part Number Exchange Description User OmniBook Repl B 900†Page Password Removal Policy Reference InformationHewlett-Packard Display Quality Statement Reference Information HP OmniBookElectrical Imperfections OmniBook 900 LCD Guidelines TFTType of Imperfection Mechanical ImperfectionsReference Information HP OmniBook Obsolete Repair Parts Obsolete PartsObsolete New Description Part Number Page Page Part Number F1770-90001