IBM 72335LU - System x3850 M2 Installation Manual page 74

v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v See the parts listing in the Problem Determination and Service Guide 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.
Lit light path
diagnostics LED with
the system-error LED
also lit Description
TEMP A system temperature or component
has exceeded specifications.
Note: A fan LED might also be lit.
MEM Memory failure.
Note: The error LED on the
memory card is also lit.
NMI A hardware error has been reported
to the operating system.
Note: The PCI or MEM LED might
also be lit.
CNFG A configuration error has occurred.
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IBM System x3850 M2 and System x3950 M2 Type 7141: Installation Guide
Action
1. See the BMC log or the system-error log for the
source of the fault.
2. Make sure that the airflow of the server is not
blocked.
3. If a fan LED is lit, reseat the fan.
4. Replace the fan for which the LED is lit.
5. Make sure that the room is neither too hot nor too
cold (see "Environment" in "Features and
specifications" on page 4).
6. If one of the VRMs indicates "hot," remove ac
power before you restore dc power.
1. Remove the memory card that has a lit error LED;
then, press the light path diagnostics button on the
memory card to identify the failed card or DIMM.
See "Diagnosing problems using light path
diagnostics" on page 57 for the location of the
LEDs.
2. Reseat the DIMM.
3. Replace the following components one at a time,
in the order shown, restarting the server each time:
a. DIMM
b. Memory card
c. (Trained service technician only)
Microprocessor board
1. See the BMC log and the system-error log.
2. If the PCI LED is lit, follow the instructions for that
LED.
3. If the MEM LED is lit, follow the instructions for
that LED.
4. Restart the server.
1. Find the failing or missing component by checking
the other light path diagnostics LEDs.
2. Make sure that the fans, power supplies,
microprocessors, VRMs, and memory cards are
installed in the correct sequence.