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Power on and power off problems

Use this information to resolve issues when powering on or powering off the server.

The power button does not work (server does not start)​

Note

After the server is connected to AC power, it will take one to three minutes for XCC to initialize. The power button does not work during the initialization.

Complete the following steps until the problem is resolved:

  1. Make sure that the power button on the server is working correctly:

    1. Disconnect the server power cords.

    2. Reconnect the server power cords.

    3. Reconnect the front operator panel cable, and then repeat steps 1a and 1b.

      • If the server starts, reseat the front operator panel.

      • If the problem remains, replace the front operator panel.

  2. Make sure that:

    • The power cords are correctly connected to the server and to a working electrical outlet.

    • The LEDs on the power supply units work normally.

    • The power button LED is lit on and flashing slowly.

    • The button-push force is sufficient and the button shows release response after pushed.

  3. If the power button LED does not light on or flash correctly, reseat all the power supply units and make sure that the power input status LED is lit on.

  4. If you have just installed an optional device, remove it, and restart the server.

  5. If the issue is still observed or without power button LED lit on, implement the minimum configuration to check whether any specific components have locked the power permission. Replace power supply units and check the power button function after installing each unit.

  6. If all procedures are tried and the issue cannot be resolved, collect the failure information with system logs captured and contact Lenovo Support.

Server does not power on​

Complete the following steps until the problem is resolved:

  1. Check the event logs for any events related to the server not powering on.

  2. Check for any LEDs that are blinking amber or yellow.

  3. Check the system status LED on the system board (system board assembly). See LEDs on the system board assembly.

  4. Check if the power input status LED is off or the yellow LED is lit on the power supply unit.

  5. Do the AC cycle to the system, that is, power off the power supply units and re-power them on.

  6. Remove the CMOS battery for at least ten seconds, then, reinstall the CMOS battery.

  7. Try to power on the system by IPMI command through XCC or by the power button.

  8. Implement the minimum configuration (see Minimal configuration for debugging).

  9. Reseat all power supply units and make sure that the power input status LED on the power supply unit is lit.

  10. Replace power supply units and check the power button function after installing each unit.

  11. If the issue cannot be resolved by all attempts above, call service to review the issue symptoms and see whether the system board (system board assembly) replacement is necessary.

Server does not power off​

Complete the following steps until the problem is resolved:
  1. Determine whether you are using an Advanced Configuration and Power Interface (ACPI) or a non-ACPI operating system. If you are using a non-ACPI operating system, complete the following steps:

    1. Press Ctrl+Alt+Delete.

    2. Turn off the server by pressing the power button on the front operator panel and holding it down for 5 seconds.

    3. Restart the server.

    4. If the server fails POST and the power-control button does not work, disconnect the power cord for 20 seconds; then, reconnect the power cord and restart the server.

  2. If the problem remains or if you are using an ACPI-aware operating system, suspect the system board (system board assembly).