HP Xw8200 - Workstation - 1 GB RAM Technical Reference Manual page 116

Table 5-4 Power Supply Problems (Continued)
Problem
Power LED flashes Red, once
every two seconds.
116 SYSTEM DIAGNOSTICS AND TROUBLESHOOTING
Cause
Power failure (power supply is
overloaded).
Solution
1 Check if a device is causing the problem by removing
ALL attached devices). Power on the system. If the
system enters the POST, then power off and replace
one device at a time and repeat this procedure until
failure occurs. Replace the device causing the failure.
Continue adding devices one at a time to ensure all
devices 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 good.
Replace the system board.
If the power supply fan does not spin or the
BIST LED does not light, replace the power
supply.