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Server controls, LEDs, and power

This section describes the controls and light-emitting diodes (LEDs) and how to turn the server on and off.

For the location of the LEDs on the system board, see System-board LEDs.

  • Front view
    Use this information to view the controls, LEDs, and connectors on the front of the server.
  • Operator information panel
    Use this information to view the operator information panel.
  • Light path diagnostics panel
    The light path diagnostics panel is located on the top of the operator information panel.
  • Rear view
    Use this information to view the controls, LEDs, and connectors on the rear of the server.
  • System pulse LEDs
    The following LEDs are on the system board and monitors the system power-on and power-off sequencing and boot progress.
  • Server power features
    When the server is connected to a power source but is not turned on, the operating system does not run, and all core logic except for the service processor (the integrated management module) is shut down; however, the server can respond to requests from the service processor, such as a remote request to turn on the server.