HP XW8400

Chassis Indicator LEDs
Power LED and Sound Activity Diagnosis and Service Action
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
system board.
2. Locate faulty device by removing all devices and then reinstalling one at a time until workstati
o
Replace the device causing the failure. Continue adding devices to ensure all are functioning p
3. Verify 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 g
o
Replace the system board.
●
If the power supply fan does not spin or the BIST LED does not light, replace the
p
supply.
Blinks red 5 times, once per second,
then 2 second pause, 5 beeps
Pre-video memory error.
●
Reseat memory modules.
●
Replace memory modules one at a time to find the faulty module.
●
Replace third-party modules with HP memory.
●
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:
●
Reseat the graphics card.
●
Replace the graphics card.
●
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 LED codes (continued)
ENWW Diagnostic error codes 105