IBM System x3650 M3 4255 Service Manual page 85

LED Problem
FAN A fan has failed, is operating too slowly,
or has been removed. The TEMP LED
might also be lit.
LINK Reserved.
LOG An error message has been written to
the system-event log
MEM When only the MEM LED is lit, a
memory error has occurred.
When both the MEM and CNFG LEDs
are lit, the memory configuration is
invalid or the PCI Option ROM is out of
resource.
NMI A nonmaskable interrupt has occurred,
or the NMI button has been pressed.
OVER The server was shut down because of a
SPEC power-supply overload condition on one
of the power channels. The power
supplies are using more power than
their maximum rating.
Action
1. Reseat the failing fan, which is indicated by a lit LED near
the fan connector on the system board..
2. Replace the failing fan, which is indicated by a lit LED near
the fan connector on the system board (see "Removing a
hot-swap fan" on page 223 for more information).
Notes:
1. If an LED that is next to an unused fan connector on the
system board is lit, a PCI riser-card assembly might be
missing; replace the PCI riser-card assembly. One PCI
riser-card assembly must always be present in PCI riser
connector 2.
2. When the BRD LED is lit and all cooling zones all asserted
at the same time by removing the cover and check if PCI
riser-card 2 LED is on.
Check the IMM system event log and the system-error log for
information about the error. Replace any components that are
identified in the error logs. (See "Event logs" on page 26 for
more information.)
Note: Each time you install or remove a DIMM, you must
disconnect the server from the power source; then, wait 10
seconds before restarting the server.
1. If the MEM LED and the CNFG LED are lit, complete the
following steps:
a. Check the system-event log in the Setup utility or IMM
error messages. Follow steps indicated in "POST error
codes" on page 28 and "Integrated management
module error messages" on page 114.
2. If the CNFG LED is not lit, the system might detect a
memory error. Complete the following steps to correct the
problem:
a. Update the server firmware to the latest level (see
"Updating the firmware" on page 253).
b. Reseat the DIMM.
c. Check the system-event log in the Setup utility or IMM
error messages. Follow steps indicated in "POST error
codes" on page 28 and "Integrated management
module error messages" on page 114.
Check the system-event log for information about the error.
1. If any of the power channel error LEDs (A, B, C, D, E, or
AUX) on the system board are lit also, see the section
about power-channel error LEDs in "Power problems" on
page 55. (See "Internal connectors, LEDs, and jumpers" on
page 15 for the location of the power channel error LEDs.)
2. Check the power-supply LEDs for an error indication (AC
LED and DC LED are not both lit, or the information LED is
lit). Replace a failing power supply.
3. Remove optional devices from the server.
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Chapter 3. Diagnostics