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General problem determination procedures

Use the information in this section to resolve problems if the event log does not contain specific errors or the rack solution is inoperative.

If you are not sure about the cause of a problem and the power supplies are working correctly, complete the following steps to attempt to resolve the problem:

  1. Power off the rack solution.

  2. Make sure that the rack solution is cabled correctly.

  3. Remove or disconnect the following devices if applicable, one at a time, until you find the failure. Power on and configure the rack solution each time you remove or disconnect a device.

    • Any external devices.

    • Surge-suppressor device.

    • Printer, mouse, and non-Lenovo devices.

    • Each adapter.

    • Hard disk drives.

  4. Power on the rack solution.

If the problem appears to be a networking problem and the rack solution passes all system tests, suspect a network cabling problem that is external to the rack solution.

  • Resolving suspected power problems
    Power problems can be difficult to solve. For example, a short circuit can exist anywhere on any of the power distribution buses. Usually, a short circuit will cause the power subsystem to shut down because of an overcurrent condition.
  • Resolving suspected Ethernet controller problems
    The method that you use to test the Ethernet controller depends on which operating system you are using. See the operating-system documentation for information about Ethernet controllers, and see the Ethernet controller device-driver readme file.