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 Problem Determination and Service Guide on the IBM System x Documentation CD 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 or
information LED also
lit Description Action
PCI BUS A PCI adapter has failed.
1. See the BMC log or the system-error log (see the
Problem Determination and Service Guide on the
IBM System x Documentation CD).
2. Reseat the failing adapter.
3. Replace the following components one at a time,
in the order shown, restarting the server each time:
a. Failing adapter
b. (Trained service technician only) System board
NMI A hardware error has been reported
to the operating system.
Note: The PCI or MEM LED might
also be lit.
1. See the BMC log and the system-error log (see
the Problem Determination and Service Guide on
the IBM System x Documentation CD).
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.
94 IBM System x3500 Type 7977: Installation Guide
