IBM System x3550 M3 Type 4254 User Manual

Power-supply LEDs
Use this information to view power-supply LEDs.
The following minimum configuration is required for the server to start:
v One microprocessor in microprocessor socket 1
v One 2 GB DIMM for each microprocessor installed (one 2 GB DIMM in slot 3 if
only one microprocessor installed)
v One power supply
v Power cord
v Five cooling fans (fan 1, 2, 3, 4, and 5)
v One PCI riser-card assembly in PCI connector 2
v One ServeRAID SAS/SATA controller
AC power-supply LEDs:
Use this information to view AC power-supply LEDs.
The following illustration shows the location of the AC power-supply LEDs on the
rear of the server. See the Problem Determination and Service Guide for additional
information about solving power-supply problems.
The following table describes the problems that are indicated by various
combinations of the power-supply LEDs on an ac power supply and suggested
actions to correct the detected problems.
AC power-supply LEDs
Description Action NotesAC DC Error (!)
On On Off Normal operation
Off Off Off No ac power to the
server or a problem
with the ac power
source.
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.
This is a normal
condition when no ac
power is present.
Off Off On No ac power to the
server or a problem
with the ac power
source and the
power-supply had
detected an
internal problem.
v Make sure that the power
cord is connected to a
functioning power source.
v Replace the power supply.
This happens only
when a second power
supply is providing
power to the server.
Figure 12. AC power-supply LEDs
Chapter 1. The IBM System x3550 M3 server 29

IBM System x3550 M3 Type 4254 Specifications

General

Brand	IBM
Model	System x3550 M3 Type 4254
Category	Server
Language	English