AC power-supply LEDs
Description Action NotesAC DC Error (!)
On Off Off Power-supply not
fully seated, faulty
system board, or
the power supply
has failed.
1. Reseat the power supply.
2. Follow actions in the “Power
problems” under the
Troubleshooting tables in the
Problem Determination and
Service Guide.
3. If the OVER SPEC LED on
the light path diagnostics is
lit, follow the actions in “Light
path diagnostics LEDs” on
page 18.
4. If the OVER SPEC LED on
the light path diagnostics is
not lit, check the error LEDs
on the system board and the
IMM2 error messages. Follow
steps in the “Power
problems” under the
Troubleshooting tables in the
Problem Determination and
Service Guide and “Solving
Power problems” in the
Problem Determination and
Service Guide until the
problem is solved.
Typically indicates a
power-supply is not
fully seated.
On Off On The power supply
has failed.
Replace the power supply.
On On On The power supply
has failed.
Replace the power supply.
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
automatically when power is restored.
v If your operating system supports the Wake on LAN feature, the Wake on LAN
feature can turn on the server.
Chapter 1. The System x3650 M4 server 27
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