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Table 2. Power-supply LEDs
Power-supply LEDs
AC
DC
Error
Off
Off
Off
Off
On
Off
On
Off
On
On
On
Off
On
Off or
On
Flashing
On
On
On
On
On
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 (IMM) is shut down; however, the server can respond to
requests from the IMM, such as a remote request to turn on the server. The
power-on LED flashes to indicate that the server is connected to AC power but not
turned on.
Turning on the server
Approximately 20 seconds after the server is connected to AC power, the
power-control button becomes active, and one or more fans might start running to
provide cooling while the server is connected to power. You can turn on the server
and start the operating system by pressing the power-control button.
The server can also be turned on in any of the following ways:
Description
Off
No AC power to
the server or a
problem with the
AC power source
No AC power to
the server or a
problem with the
AC power source
and the power
supply had
detected an
internal problem
Off
Faulty power
supply
Faulty power
supply
Off
Power supply not
fully seated,
faulty system
board, or faulty
power supply
Faulty power
supply
Off
Normal operation
Power supply is
faulty but still
operational
Action
1. Check the AC power to the server.
2. Make sure that the power cord is
connected to a functioning power
source.
3. Turn the server off and then turn the
server back on.
4. If the problem remains, replace the
power supply.
1. Replace the power supply.
2. Make sure that the power cord is
connected to a functioning power
source.
Replace the power supply.
Replace the power supply.
1. Reseat the power supply.
2. If the system board error LED is off,
replace the power supply.
3. (Trained service technician only) If the
system board error LED is lit, replace
the system board.
Replace the power supply.
Replace the power supply.
Chapter 1. The System x3500 M3 server
Notes
This is a normal
condition when no
AC power is
present.
This happens only
when a second
power supply is
providing power to
the server.
Typically indicates
that a power supply
is not fully seated.
19
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