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Interpreting Diagnostic Lights and Audible Codes

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Troubleshooting Without Diagnostics Interpreting Diagnostic Lights and Audible Codes This section covers the front panel LED codes as well as the audible codes that may occur before or during POST that do not necessarily have an error code or text message associated with them. ✎ If you see flashing LEDs on a PS/2 keyboard, look for flashing LEDs on the front panel of the computer and refer to the following table to determine the front panel LED codes. ✎ Recommended actions in the following table are listed in the order in which they should be performed. ✎ Replace the system board or power supply only as the last resort. D-6 490778-001 Service Reference Guide

Section	Page
Contents	4
Installing the Operating System	7
1.1 Microsoft Windows XP/Windows Vista/ Redflag Linux	7
1.2 Converting to NTFS (Associated with Windows OS)	8
1.3 HP Software	8
Setup Utilities and Diagnostics Features	9
2.1 Power-On Self-Test (POST)	9
2.2 Computer Setup Utilities	10
2.3 Recovering the Configuration Settings	21
Desktop Management	22
3.1 Initial Configuration and Deployment	22
3.2 ROM Flash	22
3.3 Security	24
Serial ATA Drive Guidelines and Features	28
4.1 SATA 3.0 Hard Drives	28
4.2 SATA Hard Drive Cables	29
4.3 SATA SMART Drives	30
4.4 Drive Capacities	30
4.5 SATA BIOS	30
Identifying the Chassis, Routine Care, and Disassembly Preparation	31
5.1 Chassis Designations	31
5.2 Electrostatic Discharge Information	33
5.3 Routine Care	35
5.4 Service Considerations	37
Removal and Replacement Procedures- Microtower (MT) Chassis	39
6.1 Preparation for Disassembly	39
6.2 Remove the computer access panel and front bezel (MT chassis)	40
6.3 Front Drive Bezels	42
6.4 Memory	43
6.5 Expansion Cards	44
6.6 Cable Management	49
6.7 Drives	50
6.8 Front I/O Panel Housing Assembly - MT chassis	55
6.9 System Fan	56
6.10 Heatsink - MT chassis	57
6.11 Processor	58
6.12 System Board	60
6.13 Battery	61
6.14 Power Supply	63
Connector Pin Assignments	64
Power Cord Set Requirements	68
POST Error Messages	69
Troubleshooting Without Diagnostics	72

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490778-001

Service Reference Guide

Troubleshooting Without Diagnostics

Interpreting Diagnostic Lights and Audible Codes

This section covers the front panel LED codes as well as the audible codes that may occur before

or during POST that do not necessarily have an error code or text message associated with them.

✎

If you see flashing LEDs on a PS/2 keyboard, look for flashing LEDs on the front panel of the

computer and refer to the following table to determine the front panel LED codes.

✎

Recommended actions in the following table are listed in the order in which they should be

performed.

✎

Replace the system board or power supply only as the last resort.