IBM System x3650 M3 4255 Service Manual page 88

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
AC DC Error
Off Off Off
Off Off On
Off On Off
Off On On
On Off Off
On Off or On
Flashing
On On Off
On On On
70
IBM System x3650 M3 Types 4255, 7945, and 7949: Problem Determination and Service Guide
Description Action
No ac power to
1. Check the ac power to the server.
the server or a
2. Make sure that the power cord is
problem with the
connected to a functioning power
ac power source
source.
3. Turn the server off and then turn the
server back on.
4. If the problem remains, replace the
power supply.
No ac power to
1. Replace the power supply.
the server or a
2. Make sure that the power cord is
problem with the
connected to a functioning power
ac power source
source.
and the power
supply had
detected an
internal problem
Faulty power Replace the power supply.
supply
Faulty power Replace the power supply.
supply
Power-supply not
1. (Trained service technician only)
fully seated,
Reseat the power supply.
faulty system
2. If a power channel error LED on the
board, or faulty
system board is not lit, replace the
power-supply
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.
Faulty power Replace the power supply.
supply
Normal operation
Power supply is Replace the power supply.
faulty but still
operational
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.