HP Book 900 manual AC adapter, Miscellaneous

Page 60

Symptom

PCMCIA

Call Center:

Repair Center:

Suggestions

Likely Causes

Repair Center: Comments

General problems

AC adapter

Does not power the OmniBook

Miscellaneous

Clock loses time

Computer gets hot

Make sure Card Executive is installed for Windows NT.

If the card requires an IRQ, check that there is one available.

Check for conflicts or refresh the device list in Device Manager (Windows 95) or Administrative Tools or Control Panel System (Windows NT).

Reboot the computer.

Try the card in the other slot or in another computer.

Check the OmniBook website for installation instructions (page vi).

Download current drivers from the card manufacturer’s website.

Try another ac adapter, if available.

Plug in ac adapter for 24 hours to charge backup battery.

It is normal for the computer to get hot.

Make sure the air holes in the side and bottom are clear. Make sure computer is not resting on a soft surface.

DOS games and other programs that drive CPU usage toward 100% can contribute.

Motherboard. PCMCIA socket.

AC adapter.

Motherboard.

Motherboard.

Fan.

Thermal connections. Heatsink damage.

Using a flashlight, look for bent pins inside the PCMCIA socket.

If both slots have problems, replace the motherboard. If only one slot has a problem, try replacing the PCMCIA socket.

The ac adapter is not repairable—it must be replaced.

Charge backup battery.

Check the fan. (Do not press or spin the blade with your finger.)

Check for proper contact between heatsink, thermal pads, CPU, and Northbridge IC.

3-10 Troubleshooting and Diagnostics

HP OmniBook 900

Image 60
Contents HP OmniBook Edition History Contents Figures TablesHP OmniBook Introduction Sources of OmniBook InformationSource 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 Using Fn Hot Keys Resetting the OmniBookFn Hot Keys 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-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 NumberHard Disk Drive Replacement Part Numbers Removing the Hard Disk DriveExchange 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 ToolsTroubleshooting Suggestions SymptomStartup 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 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 -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 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 OmniBookOmniBook 900 LCD Guidelines TFT Type of ImperfectionElectrical Imperfections Mechanical ImperfectionsReference Information HP OmniBook Obsolete Repair Parts Obsolete PartsObsolete New Description Part Number Page Page Part Number F1770-90001