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

Symptom

The server does not start up; the power light flashes once when you try to start the server. The flash repeats every 5 seconds.

Products affected

• Xserve G5

Solution

When the power light flashes once, this means that the server doesn't recognize any installed RAM, or that no RAM is installed.

Install memory

If no SDRAM is installed, 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. Remove the RAM, firmly reinsert it, and try starting the server again.
   
3. Try removing the memory in pairs and testing again, to isolate any possible bad DIMMs.
   
4. 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.