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

Symptom

The server does not start up; the power light flashes three times when you try to start the server. The flashes are repeated every five seconds.



Solution

When the power light flashes three times, this means that none of the RAM banks passed memory testing.

Install memory

Install the appropriate memory:

Server	SDRAM type
Xserve G5	PC3200 DDR

Check the installed memory

1. Check that the memory is installed in pairs, as described in the User's Guide.
   
2. Try removing the memory in pairs and testing again, to isolate any possible bad DIMMs.
   
3. If all DIMMs are known good memory and the issue still occurs, the logic board may need to be replaced.
   

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.