HP Book 900 manual Power-On Self-Test, Post Terminal-Error Beep Codes, Post Messages

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Power-On Self-Test

Note

If Quiet Boot is enabled in BIOS Setup (the default setting), press ESC during boot to see POST messages.

The POST (Power-On Self-Test) is a series of initialization routines and diagnostic tests that the system BIOS runs when the computer boots. The system BIOS will not boot the operating system if system memory, the CPU, DMA, or the interrupt controller fails the POST diagnostic tests. POST progress is indicated by a sequence of codes. If possible, error messages are displayed.

You should not interpret the failure of one or more POST tests as a hardware, software, or firmware failure. First, confirm the failure with a “clean” boot:

Remove all accessories, including RAM boards, floppy drive, port replicator, PC Cards, printer, external monitor, pointing device, and keyboard.

Provide “clean” ac power—no auto adapter or unusual ac adapter configuration.

Press the system-off button to start from a known state.

If the computer fails to boot with a clean boot, it requires repair. If an error message is displayed, confirm the problem using other diagnostic tools. Not all POST messages indicate a hardware, software, or firmware failure—some messages are informational messages.

If the BIOS detects a terminal error condition, it halts POST after issuing a terminal error beep code— up to four groups of 1 to 4 short beeps. The beep code indicates the POST routine in which the terminal error occurred. The BIOS also issues a beep code (one long tone followed by two short tones) during POST if the video configuration fails (no card installed or faulty) or if an external ROM module does not properly checksum to zero.

Beep Codes

1

1-2

1-2-2-3

1-3-1-1

1-3-1-3

1-3-4-1

1-3-4-3

1-4-1-1

2-1-2-3

2-2-3-1

Table 3-4. POST Terminal-Error Beep Codes

POST Description

One short beep before boot

Search for option ROMs. One long, two short beeps on checksum failure

BIOS ROM checksum

Test DRAM refresh

Test 8742 Keyboard Controller

RAM failure on address line xxxx

RAM failure on data bits xxxx of low byte of memory bus

RAM failure on data bits xxxx of high byte of memory bus

Check ROM copyright notice

Test for unexpected interrupts

The following table lists POST messages and explanations for reported problems. If the system fails after you make changes in BIOS Setup, reset the computer, enter BIOS Setup, and install the defaults or correct the error.

Message

0200 Failure Fixed Disk

Table 3-5. POST Messages

Description

Fixed disk is not working or not configured properly. Check to see if fixed disk is attached properly. Run Setup. Find out if the fixed-disk type is correctly identified.

0210 Stuck key

Stuck key on keyboard.

3-18 Troubleshooting and Diagnostics

HP OmniBook 900

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Contents HP OmniBook Edition History Contents Figures TablesHP OmniBook Introduction Sources of OmniBook InformationSource Address or NumberOmniBook 900 Models Memory Display Product ComparisonsProcessor OmniBook Features and Operation OmniBook Front ViewActivating Power Modes Turning the OmniBook On and OffKeyboard Status Lights Motherboard Checking the Status of the OmniBookMain Status Lights Motherboard Using Fn Hot Keys Resetting the OmniBookFn Hot Keys Hot KeySystem Memory System ResourcesSystem Interrupts System Input/Output Addresses 100-3FF 10. DMA ChannelsSpecifications 11. OmniBook 900 SpecificationsOnline Reference Guide 12. OmniBook 900 Accessories 900B 900† 4150 2100/7100 Accessory Description OmniBook CompatibilityDocks 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 NumberExchange Information Hard Disk Drive Replacement Part NumbersRemoving the Hard Disk Drive 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 ToolsStartup Troubleshooting SuggestionsSymptom 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 Creating a Diagnostic Floppy Disk Diagnostic ToolsOmniBook Diagnostic Program Running the Diagnostic Test Serial number Audio deviceOmniBook Diagnostic Error Codes Code Suggestions System TestsHard Disk Tests Video Tests Acpi Tests Post Messages Power-On Self-TestPost Terminal-Error Beep Codes 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 Description User OmniBook Repl 900B 900† Part Number ReferencePart Number Exchange 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 New Description Part Number Obsolete Repair PartsObsolete Parts Page Page Part Number F1770-90001