Power-Supply Leds - IBM System x3750 M4 Type 8722 Installation And Service Manual

Power-supply LEDs

The following minimum configuration is required for the AC LED on the power
supply to be lit:
v Power supply
v Power cord
v Appropriate input power from the power source
The following minimum configuration is required for the server to start:
v One microprocessor in microprocessor socket 1
v One 4GB DIMM in a DIMM connector that is associated with microprocessor
v One power supply
v Power cord
v Six cooling fans
The following illustration shows the locations of the power-supply LEDs.
The following table describes the problems that are indicated by various
combinations of the power-supply LEDs and the power-on LED on the operator
information panel and suggested actions to correct the detected problems.
Power-supply LEDs
AC DC
On On
Off Off
Off Off
Off On
164
System x3750 M4 Types 8722 and 8733: Installation and Service Guide
socket 1 on the system board
Error Description
Off Normal operation
Off No ac power to the
server or a problem
with the ac power
source.
On No input power to the
power supply or the
power-supply has
detected an internal
problem.
Off Faulty power-supply
Action
1. Check the ac power to the
server.
2. Make sure that the power
cord is connected to a
functioning power source.
3. Restart the server. If the
error remains, check the
power-supply LEDs.
4. Replace the power-supply.
v Make sure that the power
cord is connected to a
functioning power source.
v Replace the power supply.
Replace the power supply.
Notes
The server is
functioning
correctly.
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.