AC power LED: Each hot-swap power supply has an ac power LED and a dc
power LED. When the ac power LED is lit, it indicates that sufficient power is
coming into the power supply through the power cord. During typical operation, both
the ac and dc power LEDs are lit. For any other combination of LEDs, see the
Problem Determination and Service Guide on the IBM Documentation CD.
DC power LED: Each hot-swap power supply has a dc power LED and an ac
power LED. When the dc power LED is lit, it indicates that the power supply is
supplying adequate dc power to the system. During typical operation, both the ac
and dc power LEDs are lit. For any other combination of LEDs, see the Problem
Determination and Service Guide on the IBM Documentation CD.
IN OK power LED: Each hot-swap dc power supply has an IN OK power LED.
When the IN OK power LED is lit, it indicates that sufficient power is coming into
the power supply through the power cord. During typical operation, both the IN OK
and OUT OK power LEDs are lit. For any other combination of LEDs, see the
Problem Determination and Service Guide on the IBM System x Documentation
CD.
OUT OK power LED: Each hot-swap dc power supply has an OUT OK power LED.
When the OUT OK power LED is lit, it indicates that the power supply is supplying
adequate dc power to the system. During typical operation, both the IN OK and
OUT OK power LEDs are lit. For any other combination of LEDs, see the Problem
Determination and Service Guide on the IBM System x Documentation CD.
Power-supply error LED: When the power-supply error LED is lit, it indicates that
the power supply has failed.
Note: Power supply 1 is the default/primary power supply. If power supply 1 fails,
you must replace the power supply immediately.
System-error LED: When this LED is lit, it indicates that a system error has
occurred. An LED on the light path diagnostics panel is also lit to help isolate the
error. 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. You
can use IBM Systems Director to light this LED remotely. This LED is the same as
the system-locator LED on the front of the server.
Power-on LED: When this LED is lit and not flashing, it indicates that the server is
turned on. The states of the power-on LED are as follows:
Off: Power is not present, or the power supply or the LED itself has failed.
Flashing rapidly (4 times per second): The server is turned off and is not
ready to be turned on. The power-control button is disabled. This will last
approximately 5 to 10 seconds.
Flashing slowly (once per second): The server is turned off and is ready to be
turned on. You can press the power-control button to turn on the server.
Lit: The server is turned on.
Power-supply LEDs
The following illustration shows the power-supply LEDs on the rear of the server.
For more information about solving power-supply problems, see the Problem
Determination and Service Guide.
Chapter 1. The System x3650 M4 server 25
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