Solving Undetermined Problems - IBM 8852 - BladeCenter H Rack-mountable Service Manual

Solving undetermined problems

If the diagnostic aids did not diagnose the failure or if the BladeCenter unit is
inoperative, use the information in this section.
Note: When you are diagnosing a problem in the BladeCenter unit, you must
determine if the problem is in the BladeCenter unit, one of the BladeCenter
modules, or in a blade server.
v If the BladeCenter unit contains more than one blade server and only one of the
v If all of the blade servers have the same symptom, it is probably a BladeCenter
Check the LEDs on all the power modules. If the LEDs indicate that the power
modules are working correctly, and reseating the BladeCenter components does not
correct the problem, complete the following steps to remove or disconnect the
BladeCenter components one at a time until you reach a minimal configuration or
you locate the problem.
Note: You do not have to remove power from the BladeCenter unit.
1. Shut down the operating system on all blade servers.
2. Make sure that each blade server is turned off; then, pull the release handles to
3. Disengage power modules 2, 3, and 4, one at a time. To do this, pull the release
4. Disengage the I/O modules, one at a time. To do this, pull the release handle to
Note: The following minimum configuration is required for troubleshooting the
BladeCenter unit. See "Features and specifications" on page 4 for the minimum
operational configuration.
v BladeCenter unit (media tray may be connected)
v One power module in any power module bay
v One management module in either management module bay
v One blower module in either blower module bay
The BladeCenter unit can be checked with the management module Web interface
at each stage as components are removed, and will work in the minimal
configuration. If the minimal configuration does not work, do the following.
1. Recheck the management-module network settings.
2. Disengage the media tray, and slide it out of the bay approximately 1 inch.
3. Move the power module to power module bay 2.
4. Remove the power cords from the power connectors and reconnect them.
5. Replace the management module.
6. Replace the power module.
7. Replace the midplane.
20
BladeCenter H Type 8852, 7989, and 1886: Problem Determination and Service Guide
blade servers has the problem, troubleshoot the blade server that has the
problem.
unit or module problem.
the open position and slide it out of the bay approximately 1 inch.
handle to the open position and slide the power module out of its bay
approximately 1 inch.
the open position and slide the I/O module out of the bay approximately 1
inch.
Note: The front and rear panel LEDs will not function with the media tray
removed.