Table 5-24Power Supply Problems (continued)

Problem

Cause

Solution

 

 

 

Power LED flashes RED once

Power failure (power supply

1. Check if a device is causing the problem by

every two seconds.

is overloaded).

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.

 

 

 

System Diagnostics and Troubleshooting

Troubleshooting Scenarios and Solutions 145