IBM System x3550 M3 Type 4254 Problem Determination And Service Manual page 73

Table 6. IMM error messages (continued)
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, System x3550 M3 Types 4254 and 7944," on page 159 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.
A Uncorrectable Bus Error has occurred
on system %1.
(%1 =
CIM_ComputerSystem.ElementName)
Error A bus uncorrectable error
has occurred.
(Sensor = Critical Int DIM)
1. Check the
system-event log.
2. Check the DIMM error
LEDs.
3. Remove the failing
DIMM from the system
board.
4. Check for a server
firmware update.
Important: Some
cluster solutions
require specific code
levels or coordinated
code updates. If the
device is part of a
cluster solution, verify
that the latest level of
code is supported for
the cluster solution
before you update the
code.
5. Make sure that the
installed DIMMs are
supported and
configured correctly.
6. (Trained service
technician only)
Replace the system
board.
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Chapter 3. Diagnostics