Service Data; Solving Undetermined Problems - IBM BladeCenter HT 8740 Problem Determination And Service Manual

Service data

The management module stores important hardware information that can be
accessed through the management module user interface. This information is useful
for service personnel to troubleshoot problems. See the User's Guide that comes
with the management module for using the management module user interface to
get the service data information.

Solving undetermined problems

If the diagnostic aids did not diagnose the failure or if the BladeCenter HT unit is
inoperative, use the information in this section.
Note: When you are diagnosing a problem in the BladeCenter HT unit, you must
determine if the problem is in the BladeCenter HT unit, one of the BladeCenter
modules, or in a blade server.
v If the BladeCenter HT unit contains more than one blade server and only one of
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 HT 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
4. Disengage the I/O modules, one at a time. To do this, pull the release handle or
Note: The following minimum configuration is required for troubleshooting the
BladeCenter HT unit. See "Features and specifications" on page 5 for the minimum
operational configuration.
v BladeCenter HT unit (media tray may be connected)
v One power module in power module bay 1
v Four fan modules
v One management module in management-module bay 1 or 2.
v One multiplexer expansion module in multiplexer expansion-module bay 1 or 2.
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BladeCenter HT Type 8740 and 8750: Problem Determination and Service Guide
the blade servers has the problem, troubleshoot the blade server that has the
problem.
HT unit or module problem.
the open position and slide it out of the bay approximately 1 inch.
release handle to the open position and slide the power module out of its bay
approximately 1 inch.
Note: Blade servers in bays 7 through 10 will not power on with power modules
3 and 4 removed.
release handles to the open position and slide the I/O module out of the bay
approximately 1 inch.