IBM System x3650 M3 4255 Service Guide

Table 8. Power-supply LEDs
v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v See Chapter 4, “Parts listing, Types 4255, 7945, and 7949 server,” on page 157 to determine which
components are customer replaceable units (CRU) and which components are field replaceable units
(FRU).
v If an action step is preceded by “(Trained service technician only),” that step must be performed only by a
trained service technician.
v Go to the IBM support Web site at http://www.ibm.com/systems/support/ to check for technical
information, hints, tips, and new device drivers or to submit a request for information.
AC power-supply LEDs
Description Action NotesAC DC Error
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. Turn the server off and then turn the
server back on.
4. If the problem remains, 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
1. Replace the power supply.
2. Make sure that the power cord is
connected to a functioning power
source.
This happens only
when a second
power supply is
providing power to
the server.
Off On Off Faulty power
supply
Replace the power supply.
Off On On Faulty power
supply
Replace the power supply.
On Off Off Power-supply not
fully seated,
faulty system
board, or faulty
power-supply
1. (Trained service technician only)
Reseat the power supply.
2. If a power channel error LED on the
system board is not lit, replace the
power-supply (see the documentation
that comes with the power supply for
instructions).
3. If a power channel error LED on the
system board is lit, (trained service
technician only) replace the system
board.
Typically indicates
that a power supply
is not fully seated.
On Off or
Flashing
On Faulty power
supply
Replace the power supply.
On On Off Normal operation
On On On Power supply is
faulty but still
operational
Replace the power supply.
70 IBM System x3650 M3 Types 4255, 7945, and 7949: Problem Determination and Service Guide

IBM System x3650 M3 4255 Specifications

General

Form Factor	2U Rack
Chipset	Intel 5520
Max Processors	2
Processor	Intel Xeon 5600 series
Memory	Up to 192GB DDR3
Network Interface	Dual-port Gigabit Ethernet
Hard Drive Bays	Up to 16 x 2.5" or 6 x 3.5"
RAID Support	RAID 0, 1, 10
Memory Slots	18 DIMM slots
Operating System Support	Microsoft Windows Server, Red Hat Enterprise Linux, SUSE Linux Enterprise Server, VMware