112 SYSTEM DIAGNOSTICS AND TROUBLESHOOTING
Blinks RED 3 times, once per
second, then 2-second pause,
3 beeps
CPU not installed:
1 Install CPU.
2 Reseat CPU.
Blinks RED 4 times, once per
second, then 2 second pause,
4 beeps
Power supply failure:
1 Open the access panel and be sure the four-wire power supply cable is properly
connected to the system board.
2 Locate 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.
3 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.
z If the power supply fan spins and the BIST LED lights, then the power
supply is good. Replace the system board.
z If the power supply fan does not spin or the BIST LED does not light,
replace the power supply.
Blinks RED 5 times, once per
second, then 2 second pause,
5 beeps
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.
Blinks RED 6 times, once per
second, then 2 second pause,
6 beeps
Pre-video graphics card error.
For systems with integrated graphics, replace system board.
For systems with graphic cards,
1 Reseat the graphics card. Power on the system.
2 Replace the graphics card.
3 Replace the system board.
Blinks RED 7 times, once per
second, then 2 second pause,
7 beeps.
System board failure (ROM detected failure before video).
Replace system board.
Blinks RED 8 times, once per
second, then 2 second pause,
8 beeps
Invalid ROM based on bad checksum.
1 Reflash ROM.
2 Replace system board.
Blinks RED 9 times, once per
second, then 2 second pause,
9 beeps
System powers on but is unable to boot.
1 Replace the system board.
2 Replace the processor.
Table 5-2 Diagnostic Light Codes (Continued)
Chassis Indicator Lights (Continued)
Power LED and Sound
Activity
Diagnosis and Service Action
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