IBM QS21 Service Guide - Page 113
Solving, undetermined, problems
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Solving undetermined problems Note: 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 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. 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 board (see "Removing the blade-server front bezel assembly" on page 41 for the location of the connector). 4. If no LEDs on the control panel are working of the blade server, replace the 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). 5. Reinstall the blade server and check. If the blade server remains inactive, continue with step 6. 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 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. 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. Chapter 5. Diagnostics and troubleshooting 95