User Service Guide, Fourth Edition - Server Expansion Unit

Chapter 4
Troubleshooting
Common Installation Problems
23
The Server Does Not Power On
To check for power related problems:
1. Check each LED of the bulk power supply (BPS).
The LED is located on the BPS at the front of the Server Expansion Unit. Remove the front bezel to see
the BPS LED. Table 4-2 shows the states of the LEDs.
2. Check that the BPS and power cords are plugged into the chassis.
The Server Expansion Unit Powers On But Then Shuts Down with a Fault Light
To check for the following problems when the Server Expansion Unit powers on and then off:
1. Check for fault LEDs and check the MP logs for errors.
2. Check that a conductive item has not been dropped or left inside the Server Expansion Unit chassis.
3. Check the connections on all boards.
4. Check the system backplane for bent pins.
5. Minimize configuration to isolate a potential bad device.