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Power problems

Use this information to solve power problems.

Table 1. Power problems.

A table with one spanned column at the top and two additional columns with headers. This table provides information about symptoms and user actions to solve power problems.

  • Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved.
  • See Parts listing, Lenovo System x3750 M4 Type 8753 to determine which components are customer replaceable units (CRU) and which components are field replaceable units (FRU).
  • If an action step is preceded by (Trained service technician only), that step must be performed only by a Trained service technician.
SymptomAction

The power-on button does not work, and the reset button does not work (the server does not start).

Note
The power-on button will not function until approximately 10 seconds after the server has been connected to ac power.
  1. Check the ac power LED and the dc power LED on the power supply see Power-supply LEDs.
  2. Check the IMM2 event log and resolve any errors related to the device.
  3. Install an additional power supply or change the input power source from 110 V to 220 V.
  4. If you just installed an optional device, remove it and restart the server. If the server now starts, you might have installed more devices than the power supply can support.
  5. Make sure that the power interposer card is connected to the power supply connector and the system board correctly.
  6. Replace the operator information panel and operator information panel cable.
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, complete the following steps:
    1. Press Ctrl+Alt+Delete.
    2. Turn off the server by pressing the power-on button and holding it down for 5 seconds.
    3. Restart the server.
    4. If the server fails POST and the power-on button does not work, disconnect the ac power cord for 20 seconds; then, reconnect the ac 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.
  1. Check the IMM2 event log for errors and resolve any errors associated with the device.
  2. Check the LCD display panel for other error information.
  3. If the problem remains, see Solving undetermined problems.
The server goes directly to the POST Event Viewer when it is turned on.Check the IMM2 event log and resolve any errors that has occurred.