Power-Supply Led Errors - IBM XSERIES 255 TYPE 8685 Hardware Maintenance Manual And Troubleshooting Manual

Note: See "System" on page 160 to determine which components should be replaced by a field service technician.
Software problem
Symptom
Suspected software problem.
Note: See "System" on page 160 to determine which components should be replaced by a field service technician.
Universal Serial Bus (USB) port problems
Symptom
A USB device does not work.

Power-supply LED errors

Use the information in this section to solve power-supply problems.
Note: The minimum configuration required for the dc good light to be lit is:
Note: See "System" on page 160 to determine which components should be replaced by a field service technician.
AC good LED DC good LED
Off Off
FRU/action
1. To determine if problems are caused by the software, verify that:
v Your server has the minimum memory needed to use the software. For
memory requirements, see the information that comes with the software.
Note: If you have just installed an adapter or memory, you might have a
memory address conflict.
v The software is designed to operate on your server.
v Other software works on your server.
v The software that you are using works on another system.
If you received any error messages when using the software program, see the
information that comes with the software for a description of the messages and
suggested solutions to the problem.
2. If you have verified these items and the problem remains, contact your place of
purchase.
FRU/action
v Verify that:
– You are not trying to use a USB device during POST if you have a standard
(non-USB) keyboard attached to the keyboard port.
Note: If a standard (non-USB) keyboard is attached to the keyboard port, the
USB is disabled and no USB device will work during POST.
– The correct USB device driver is installed.
– Your operating system supports USB devices.
v Power supply.
v Power backplane.
v System board (set switch 7 of SW2 to bypass the power switch; see
"System-board switches and jumpers" on page 45.)
Description
No power to system or ac
problem.
FRU/action
1. Check ac power to the system.
2. Power supply.
Chapter 6. Symptom-to-FRU index
145