Power problems

Table 1. Power problems and actions.

The power problems and actions table with one level of row and column headers.

Symptom Action
The power-control button does not work, and the reset button does not work (the server does not start).
Note: The power-control button will not function until approximately 20 seconds after the server has been connected to power.
  1. Verify that input power is applied to the server and that the power supplies are functioning:
    1. Make sure that both power supplies installed in the server are of the same type. Mixing different power supplies in the server will cause a system error.

    2. Make sure that the power cords are correctly connected to the server and to a working electrical outlet. The power source meets the input power requirements for the installed power supplies (see the power supply labels).

    3. Make sure that the LEDs on the power supplies do not indicate a problem. See Power-supply LEDs.
  2. Make sure that the power-control button and the reset button are working correctly:
    1. Disconnect the server power cords.
    2. Reconnect the power cords.
    3. (Trained technician only) Reseat the operator information panel cable, and then repeat steps a and b.
    4. (Trained technician only) If the problem remains, reseat the operator information panel.
    5. (Trained technician only) If the problem still remains, replace the operator information panel.
  3. Make sure that:
    • The type of memory that is installed is correct.
    • The processors are installed in the correct sequence.
    • The minimum number of DIMMs are installed and functional for your processor configuration.
  4. If you installed an optional device, remove it, and restart the server. If the server now starts, you might have installed more devices than the total devices that power supply could support.
  5. If the problem still remains, see Solving undetermined problems.
  6. If everything is done but the issue still cannot be resolved, please collect the failure information with system logs captured to Lenovo support.
The server does not turn off.
  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, do the following:
    1. Press Ctrl+Alt+Delete.
    2. Turn off the server by pressing the power-control button for five seconds.
    3. Restart the server.
    4. If the server fails the POST and the power-control button does not work, disconnect the power cord for five 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.
The server unexpectedly shuts down, and the LEDs on the operator information panel are not lit. See Solving undetermined problems.