IBM eServer xSeries 455 Type 8855 Hardware Maintenance Manual And Troubleshooting Manual page 209

Symptom
Power problems
The server does not turn on.
The server does not turn off.
The server does not turn on
once back together (loose
connection(s) and/or bent pins)
The server turns on but then
turns off with fault light (bent
pin(s); short on board)
The server starts up but does
not POST (loose connection(s);
incorrect processor stepping;
system speed too high for
processors; memory not stuffed
in documented order;
unsupported or unvalidated
DIMMS)
Software problems
Suspected software problem.
Universal Serial Bus (USB)
port problems
A USB device does not work.
Suggested action
Make sure that:
1. The power cables are properly connected to the server.
2. The electrical outlet functions properly.
3. The type of memory installed is correct.
4. If you just installed an option, remove it, and restart the server. If the server
now turns on, you might have installed more options than the power supply
supports.
5. The LEDs on the power supply are on.
6. The operations panel functions properly.
7. VRM I/O board functions properly.
8. RSA system reset.
9. See "Power checkout" on page 74 for further problem determination steps.
Verify whether you are using an ACPI or non-ACPI operating system.
If you are using a non-ACPI operating system:
1. Press Ctrl+Alt+Delete.
2. Turn off the system by using the power-control button.
1. Reseat boards and VRMs.
2. Check front panel cable connections.
1. Reseat microprocessor.
2. Microprocessor.
1. Check that screw or other conductive item has not been dropped into
system.
2. Reseat boards and VRMs.
3. Check for bent pins on cables.
4. Check for bent pins on processors.
To determine if problems are caused by the software, verify that:
1. The server has the minimum memory requirements needed to use the
software. For memory requirements, refer to the information that comes with
the software.
Note: If you have just installed an adapter or memory, you might have a
memory address conflict.
2. The software is designed to operate on the server.
3. Other software works on the server.
4. The software that you are using works on another system.
If you received any error messages when using the software program, refer to the
information that comes with the software for a description of the messages and
solutions to the problem.
If the items above are correct and the problem remains, contact your place of
purchase.
Verify that:
1. The correct USB device driver is installed.
2. Your operating system supports USB devices.
Chapter 6. Symptom-to-FRU index
199