Solving Undetermined Problems - IBM QS21 - BladeCenter - 0792 Service Manual

Solving undetermined problems

Note: When you are diagnosing a problem in the blade server, you must determine
If the blade server is inoperative, use the information in this section.
If you suspect that a software problem is causing failures (continuous or
intermittent), see "Software problems" on page 58.
Check the LEDs on all the power supplies of the BladeCenter unit in which the
blade server is installed. If the LEDs indicate that the power supplies are working
correctly and reseating the blade server does not correct the problem, complete the
following steps:
1. Turn off the blade server.
2. Remove the blade server from the BladeCenter unit and remove the cover.
3. Make sure that the control panel connector is correctly seated on the system
4. If no LEDs on the control panel are working of the blade server, replace the
5. Reinstall the blade server and check. If the blade server remains inactive,
6. Turn off the blade server.
7. Remove the blade server from the BladeCenter unit and remove the cover.
8. Remove or disconnect the following devices one at a time, if installed, until you
If the problem is solved when you remove the device from the blade server but the
problem recurs when you reinstall the same device, suspect the device; if the
problem recurs when you replace the device with a different one, suspect the
system board. Have a trained service technician replace the system board
assembly.
If you suspect a networking problem and the blade server passes all the system
tests, suspect the network switch. However, the problem may concern the network
itself and be external to the system.
whether the problem is in the blade server or in the BladeCenter unit.
v If all of the blade servers have the same symptom, the problem is
probably elsewhere in the infrastructure. For more information, see the
Hardware Maintenance Manual and Troubleshooting Guide or Problem
Determination and Service Guide for your BladeCenter unit.
v If the BladeCenter unit contains more than one blade server and only one
of the blade servers has the problem, troubleshoot the blade server that
has the problem.
board (see "Removing the blade-server front bezel assembly" on page 41 for
the location of the connector).
bezel assembly. Try to turn on the blade server from the Advanced Management
Module (see the documentation for the BladeCenter unit and Advanced
Management Module for more information).
continue with step 6.
find the failure:
v High Speed InfiniBand expansion card
v SAS expansion card
v I/O buffer DIMMx
Reinstall, turn on, and reconfigure the blade server each time.
Chapter 5. Diagnostics and troubleshooting
95