Server Power Features - IBM System x3650 M4 Type 7915 Problem Determination And Service Manual

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:

Server power features

When the server is connected to an ac power source but is not turned on, the
operating system does not run, and all core logic except for the integrated
management module II (IMM2) is shut down; however, the server can respond to
requests from IMM2, such as a remote request to turn on the server. The power-on
LED flashes to indicate that the server is connected to an ac power source but is
not turned on.
Turning on the server
Approximately 5 seconds after the server is connected to power, one or more fans
might start running to provide cooling while the server is connected to power and
the power-on button LED will blink quickly. Approximately 5 to 10 seconds after the
server is connected to power, the power-control button becomes active (the
power-on LED will blink slowly), and one or more fans might start running to provide
cooling while the server is connected to power. You can turn on the server by
pressing the power-control button.
The server can also be turned on in any of the following ways:
v If a power failure occurs while the server is turned on, the server will restart
v If your operating system supports the Wake on LAN feature, the Wake on LAN
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IBM System x3650 M4 Type 7915: Problem Determination and Service Guide
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.
automatically when power is restored.
feature can turn on the server.