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System Diagnostics and
Troubleshooting
Diagnostic Light Codes 141
Beeps and blinks RED 4 times Power supply failure:
1. Locate the faulty device by removing all devices and then reinstalling one at a
time until workstation fails. Replace the device causing the failure. Continue
adding devices to ensure all are functioning properly.
2. Check the power supply functionality.
a. Disconnect AC power.
b. Remove all internal power supply cables from the system board.
c. Plug in AC power.
• If the power supply fan spins and the BIST LED lights, then the power
supply is functional. Replace the system board.
• If the power supply fan does not spin or the BIST LED does not light,
replace the power supply.
Beeps and blinks RED 5 times Pre-video memory error:
1. Reseat memory modules.
2. Replace memory modules one at a time to find the faulty module.
3. Replace third-party modules with HP memory.
4. Replace system board.
Beeps and blinks RED 6 times Pre-video graphics card error:
For systems with integrated graphics, replace the system board.
For systems with graphic cards:
1. Reseat the graphics card.
2. Replace the graphics card.
3. Replace the system board.
Beeps and blinks RED 7 times System board failure (ROM detected failure before video).
Replace system board.
Beeps and blinks RED 8 times Invalid ROM based on bad checksum.
1. Reflash the ROM.
2. Replace the system board.
Beeps and blinks RED 9 times System powers on but is unable to boot.
1. Replace the system board.
2. Replace the processor.
Table 5-22 Diagnostic Light Codes (continued)
Chassis Indicator Lights (continued)
Power LED and Sound Activity Diagnosis and Service Action