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Knowledge Article: ID B0421C081: CPU %d over temperature

Description

The service processor for the specified CPU detects that the CPU has exceeded a critical thermal threshold (overheating due to an overload).

Causes

The heat sink could have become unsecured or there is not enough grease on the specified CPU.

Implications

The CPU is shut down.

Resolutions

Perform these steps:

  1. Check the room ambient temperature to ensure that it is within the operating specifications for the chassis.
  2. verify that all fan/blower modules are running. Replace fan modules if necessary.
  3. verify that a device or filler is installed in each bay in the front and rear of the chassis, and verify that there is nothing covering the bays. Any missing components can cause a major reduction in airflow for the blade server.
  4. Verify that there is nothing covering the media tray (that will disrupt the airflow to the ambient temperature sensor).
  5. Update the firmware for the advanced management module. You can find firmware on the IBM BladeCenter software and device drivers Web page.
  6. Update the firmware for the blade server.
  7. For all blade servers other than the JSxx blade servers, make sure the heat sink and CPU are secured on the system board.

    Note: Be careful when handling the heat sink and CPU, they can be extremely hot.

  8. Check the IBM Support Web page for any service bulletins that might be related to this problem.

Additional information

To find additional troubleshooting help, visit the "IBM Support & downloads" Web site, select "BladeCenter" for "Browse products for support" panel. At "Support & downloads quick start" page, select your product for "Choose your products", and "Troubleshooting" for "Choose your page", then select "View your page" for "See your results". To narrow the results, search with keywords that are related to this article, such as "fail", "Chassis", etc. in the "Search support" field at the right panel.

To download the latest firmware or drivers, visit the "Fix Central" Web site, select "BladeCenter" for "Product Group" (from the pull-down lists), select your product for "Product" (from the pull-down lists), select your product machine type for "Product" (from the pull-down lists), and select your operating system for "Operating system" (from the pull-down lists). You can refine the search by selecting the category of the download of your interest from the "Refine results" list.