Xserve G5: Won‘t start up, power light flashes four times

Symptom

The server does not start up; the power light flashes four times when you try to start the server. The flashes repeat every 5 seconds.

Products affected

• Xserve G5

Solution

When the power light flashes four times, this means that the server's ROM may be bad.

Try each of these steps in order, testing in between steps to see if the server starts:

1. Remove the processor module and reinsert it securely.
   
2. Replace the processor module.
   
3. Replace the logic board.

Note: When installing the replacement logic board, make sure the ports and ID button on the back of the board align with the opening in the chassis.