HP Xw9300 HP xw9300 Service and Technical Reference Guide - Page 145

Power Supply Problems continued, Table 5-24

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System Diagnostics and Troubleshooting Table 5-24 Power Supply Problems (continued) Problem Cause Solution Power LED flashes RED once every two seconds. Power failure (power supply is overloaded). 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 the AC power. b. Remove all internal power supply cables from the system board. c. Plug in the AC power. • If the power supply fan spins and the BIST LED lights, the power supply is functional, so replace the system board. • If the power supply fan does not spin or the BIST LED does not light, replace the power supply. Troubleshooting Scenarios and Solutions 145

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System Diagnostics and
Troubleshooting
Troubleshooting Scenarios and Solutions
145
Power LED flashes RED once
every two seconds.
Power failure (power supply
is overloaded).
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 the AC power.
b.
Remove all internal power supply cables
from the system board.
c.
Plug in the AC power.
•
If the power supply fan spins and the
BIST LED lights, the power supply is
functional, so replace the system board.
•
If the power supply fan does not spin or
the BIST LED does not light, replace the
power supply.
Table 5-24
Power Supply Problems (continued)
Problem
Cause
Solution