HP Book 900 manual Removing the Motherboard or Bottom Case, Exchange Information

Page 40

Note

For an OmniBook 900 with a 12-inch display and serial number before TW92500000, if the top case has been damaged by excessive pressure above the hard disk slot, 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, and if the hard disk slot has a metal bracket across the top of the slot, replace just the top case.

If the bottom case has such a pad in the hard disk slot, but there is no metal bracket across the top of the slot, you should also install a HDD bracket above the hard disk slot.

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

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 2-6).

Keyboard (page 2-12).

Display assembly (page 2-16).

CPU module (page 2-14).

Top case (page 2-18).

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.

2-20 Removal and Replacement

HP OmniBook 900

Image 40
Contents HP OmniBook Edition History Contents Figures TablesHP OmniBook Introduction Sources of OmniBook InformationSource Address or NumberOmniBook 900 Models Processor OmniBook Product ComparisonsMemory Display Features and Operation OmniBook Front ViewActivating Power Modes Turning the OmniBook On and OffMain Status Lights Motherboard Checking the Status of the OmniBookKeyboard Status Lights Motherboard Using Fn Hot Keys Resetting the OmniBookFn Hot Keys Hot KeySystem Interrupts System ResourcesSystem Memory System Input/Output Addresses 100-3FF 10. DMA ChannelsSpecifications 11. OmniBook 900 SpecificationsOnline Reference Guide 12. OmniBook 900 Accessories Docks Accessory Description OmniBook Compatibility900B 900† 4150 2100/7100 Replaceable Module Diagram Internal Design13. Functional Structure Docking portRemoval and Replacement Removal Cross-ReferenceRequired Equipment Recommended Screw TorquesScrew Thread Size M1.4 Torque kgfcm Torque lbfinRemoving the Battery Removal ProcedureReassembly Notes Installing a Battery PanelRAM Board Replacement Part Numbers Removing a RAM BoardPart Number Exchange Part NumberRemoving the Hard Disk Drive Hard Disk Drive Replacement Part NumbersExchange Information Removing the Hard Disk Drive Creating a Hibernate Partition Replacement Procedure Replacing Small PartsReplacing Small Parts User-Replaceable 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 Cable, display power Case, display Hinge Latch, display LCD module Removal ProceduresRemoving Display Components 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 ToolsSymptom Troubleshooting SuggestionsStartup Power/Battery Call Center SuggestionsRepair Center Likely Causes Repair Center CommentsWhite display Erratic display Symptom Keyboard Pointing stick Call Center SuggestionsSerial/Parallel AC adapter MiscellaneousAccessories OmniBook Diagnostic Program Diagnostic ToolsCreating 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 Post Terminal-Error Beep Codes Power-On Self-TestPost Messages System battery is dead Replace and run Setup Message DescriptionEntering Setup Sycard PCCtest 450 CardBus Card Optional Lower slot PCT450 -b69 -0Installing the DMI Package Uninstalling the DMI PackageUsing the DMI Interface Desktop Management Interface DMIContents of the DMI Package Bios Setup Utility Running the Bios Setup UtilityBios Setup Menus and Parameters Main Menu DefaultSystem Devices Menu Default Security Menu DefaultPower Menu Boot Menu DefaultOB 900B On OB 900† Off 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 Exchange Part Number ReferenceDescription 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 OmniBookOmniBook 900 LCD Guidelines TFT Type of ImperfectionElectrical Imperfections Mechanical ImperfectionsReference Information HP OmniBook Obsolete Parts Obsolete Repair PartsObsolete New Description Part Number Page Page Part Number F1770-90001