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• The operating system supports USB devices.
• The correct USB device driver is installed. For the latest device drivers, go to http://www.ibm.com/
supportportal/.
3. (Trained service technician only) Replace the system-board assembly - See "Removing the system-
board assembly - BladeCenter HX5" on page 140 and "Installing the system-board assembly -
BladeCenter HX5" on page 142.
Solving undetermined problems
Use this information to diagnose and solve undetermined issues with the blade server.
Notes: When you are diagnosing a problem in the blade server, you must determine whether the problem is
in the blade server or in the BladeCenter chassis.
• If all of the blade servers have the same symptom, the problem is probably in the BladeCenter chassis.
For more information, see the Hardware Maintenance Manual and Troubleshooting Guide or Problem
Determination and Service Guide for your BladeCenter chassis.
• If the BladeCenter chassis contains more than one blade server and only one of the blade servers has the
problem, troubleshoot the blade server that has the problem.
If DSA did not diagnose the failure or 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 273.
Damaged data in CMOS memory or damaged UEFI code can cause undetermined problems. To reset the
CMOS data, remove and replace the battery to override the power-on password and clear the CMOS
memory; see "Removing the battery" on page 76. If you suspect that the UEFI code is damaged, see
"Recovering from a UEFI update failure" on page 49.
Check the LEDs on all the power supplies of the BladeCenter chassis 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. Make sure that the control panel connector is correctly seated on the system board (see "Blade server
connectors - BladeCenter HX5" on page 12 for the location of the connector).
2. If no LEDs on the control panel are working, replace the bezel assembly; then, try to turn on the blade
server from the advanced management module (see the documentation for the BladeCenter chassis and
advanced management module for more information).
3. Turn off the blade server.
4. Remove the blade server from the BladeCenter chassis and remove the cover.
5. Remove or disconnect the following devices, one at a time, until you find the failure. Reinstall, turn on,
and reconfigure the blade server each time.
• I/O expansion card.
• Storage drives.
• DIMMs. The minimum configuration requirement is 4 GB (two 2 GB DIMMs on the system board).
The following minimum configuration is required for the blade server to start:
• System board
• One microprocessor
• Two 2 GB DIMMs
• A functioning BladeCenter chassis
6. Install and turn on the blade server. If the problem remains, suspect the following components in the
following order:
a. DIMM
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BladeCenter HX5 Blade ServerProblem Determination and Service Guide
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