System-error LED: When this LED is lit, it indicates that a system error hasoccurred. An LED on the light path diagnostics panel is also lit to help isolate theerror. This LED is the same as the system-error LED on the front of the server.Locator LED: Use this LED to visually locate the server among other servers. Youcan use IBM Systems Director to light this LED remotely. This LED is the same asthe system-locator LED on the front of the server.Power-on LED: Press this button to turn the server on and off manually or towake the server from a reduced-power state. The states of the power-on LED areas follows:v Off: AC power is not present, or the power supply or the LED itself has failed.v Flashing rapidly (4 times per second): The server is turned off and is not readyto be turned on. The power-control button is disabled. This will lastapproximately 20 to 40 seconds.Note: Approximately 40 seconds after the server is connected to ac power, thepower-control button becomes active.v Flashing slowly (once per second): The server is turned off and is ready to beturned on. You can press the power-control button to turn on the server.v Lit: The server is turned on.v Fading on and off: The server is in a reduced-power state. To wake the server,press the power-control button or use the IMM Web interface. For informationabout logging on to the IMM Web interface, see “Logging on to the Webinterface” on page 171.Power-supply LEDsThe following illustration shows the power-supply LEDs on the rear of the server.For more information about solving power-supply problems, see the ProblemDetermination and Service Guide.The following table describes the problems that are indicated by variouscombinations of the power-supply LEDs and the power-on LED on the operatorinformation panel and suggested actions to correct the detected problems.Figure 11. Power-supply LEDs rear view20 System x3650 M3 Types 4255, 7945, and 7949: Installation and User’s Guide
