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IBM 7945G2U Installation And User Manual page 34

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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.
IN OK power LED: Each hot-swap dc power supply has an IN OK power LED and
an OUT 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.
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.
OUT OK power LED: Each hot-swap dc power supply has an IN OK power LED
and 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.
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: Press this button to turn the server on and off manually or to wake
the server from a reduced-power state. The states of the power-on LED are as
follows:
18
System x3650 M3 Types 4255, 7945, and 7949: Installation and User's Guide
Off: AC 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 20 to 40 seconds.
Note: Approximately 40 seconds after the server is connected to ac power, the
power-control button becomes active.
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.
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 information
about logging on to the IMM Web interface, see "Logging on to the Web
interface" on page 155.

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