Table 10. Integrated management module 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, Types 4255, 7945, and 7949 server,” on page 157 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.
Memory uncorrectable error
detected for DIMM n Status on
Memory Subsystem DIMM n
Status.
(n = DIMM number)
Error A memory uncorrectable error
has occurred.
1. Check the IBM support
website for an applicable
retain tip or firmware update
that applies to this memory
error.
2. Manually re-enable all
affected DIMMs if the server
firmware version is older than
UEFI v1.10. If the server
firmware version is UEFI
v1.10 or newer, disconnect
and reconnect the server to
the power source and restart
the server.
3. Swap the affected DIMMs (as
indicated by the error LEDs
on the system board or the
event logs) to a different
memory channel or
microprocessor (see
“Installing a memory module”
on page 217 for memory
population).
4. If the problem follows the
DIMM, replace the failing
DIMM (see “Removing a
memory module (DIMM)” on
page 217 and “Installing a
memory module” on page
217).
5. (Trained service technician
only) If the problem occurs on
the same DIMM connector,
check the DIMM connector. If
the connector contains any
foreign material or is
damaged, replace the system
board (see “Removing the
system board” on page 247
and “Installing the system
board” on page 248).
(Continued on the next page)
Chapter 3. Diagnostics 139
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