Server componentsTroubleshooting by system LEDs and diagnostics displayTroubleshooting by system LEDs and diagnostics displaySee the following section for information on available system LEDs and diagnostics display.LEDs and buttons on the front I/O moduleThe front I/O module of the server provides control buttons, connectors, and LEDs.LEDs and buttons on Datacenter Secure Control Module (DC-SCM)The Datacenter Secure Control Module (DC-SCM) provides controls, connectors, and LEDs.LEDs on the system boardThe following illustrations show the light-emitting diodes (LEDs) on the system board.Front backplane LEDs and rear drive LEDsThis topic offers the status of LEDs on the front backplane, and rear drives LEDs showing via light pipes.The LED on the power supply unitThis topic provides information about the LED status of a power supply unit.Give documentation feedback