Power problems

Identify power problem symptoms and the corrective actions to take.

  • Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved.
  • See Parts listing, type 7891 to determine which components are CRUs and which components are FRUs.
  • If an action step is preceded by "(Trained service technician only)," that step must be performed only by a trained service technician.
Symptom Action
Power button does not work.
  1. Use the BladeCenter® management module to verify that local power control for the blade server is enabled.
  2. Reseat the control-panel connector.
  3. Replace the bezel assembly.
  4. Replace the system-board
The blade server does not turn on.
  1. Make sure that:
    1. The power LED on the front of the BladeCenter unit is on.
    2. The LEDs on all the BladeCenter power modules are on.
    3. The blade server is in a blade bay that is supported by the power modules installed in the BladeCenter unit.
    4. If the power LED is flashing rapidly , and continues to flash rapidly, the blade server is not communicating with the management module; reseat the blade server by following these procedures:
    5. If the power LED is off instead of flashing slowly or rapidly, the blade bay is not receiving power, the blade server is defective, or the LED information panel is loose or defective.
    6. Local power control for the blade server is enabled (use the BladeCenter Advanced Management Module Web interface to erify), or the blade server was instructed through the management module Web interface to start.
  2. If you just installed a device in the blade server, remove it, and restart the blade server. If the blade server now starts, you might have installed more devices than the power to that blade bay supports.
  3. Try another blade server in the blade bay; if it works, replace the faulty blade server.
  4. See Solving undetermined problems.
The blade server turns off for no apparent reason
  1. Make sure that each blade bay has a blade server, expansion unit, or blade filler correctly installed. If these components are missing or incorrectly installed, an over-temperature condition might result in shutdown.
  2. Check the Advanced Management Module event log for error messages.
  3. Check the blade server light path. See Light path diagnostics LEDs
  4. If the system board error LED is lit, replace the system board.
The blade server does not turn off.
  1. Verify whether you are using an ACPI or non-ACPI operating system. If you are using a non-ACPI operating system:
    1. Press Ctrl+Alt+Delete.
    2. Turn off the system by holding the power-control button for 4 seconds.
    3. If the blade server fails during POST and the power-control button does not work, remove the blade server from the bay and reseat it.
  2. If the problem remains or if you are using an ACPI-aware operating system, suspect the system board.
  3. Verify the Power button is working correctly.
  4. Ensure local power control for the blade server is enabled.
Parent topic: Troubleshooting tables

Notices | Terms of use | Privacy | Support