IBM System x3850 Installation Manual page 75

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
VRM A VRM has failed or is missing.
LOG Information is present in the BMC
log and system-error log. One or
both logs may be full or close to full.
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.
Action
1. Check the BMC log or the system-error log to
determine the reason for the lit LED (for a VRM).
2. Find the failing or missing VRM by checking the
LEDs on the microprocessor tray.
3. Install any missing VRMs.
4. Reseat the following components:
a. Failing VRM
b. (Trained service technician only)
Microprocessor associated with the VRM
c. Microprocessor tray
5. Replace the following components one at a time,
in the order shown, restarting the server each time.
a. Failing VRM
b. (Trained service technician only)
Microprocessor associated with the VRM
c. (Trained service technician only)
Microprocessor tray
1. The system-error log is 75% full; save the log if
necessary and clear it.
2. Check the log for possible errors.
1. Remove the memory card with the lit error LED on
the top of the card; then, press the light path
button on the memory card to identify the failed
card or DIMM.
2. Reseat the DIMM.
3. Replace the following components one at a time,
in the order shown, restarting the server each time.
a. Memory board
b. DIMM
c. (Trained service technician only)
Microprocessor tray
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.
Chapter 6. Solving problems
63