IBM 7378, Problem Determination And Service Manual

Page: 78 / 362

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 x3400 M3 Types 7378 and 7379,” on page 141 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 231 for memory
population).
4. If the problem follows the
DIMM, replace the failing
DIMM (see “Removing a
memory module” on page 230
and “Installing a memory
module” on page 231).
(Continued on the next page)
60
IBM System x3400 M3 Types 7378 and 7379: Problem Determination and Service Guide