IBM 7378, Problem Determination And Service Manual

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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 Logging Limit Reached for
DIMM One of the DIMMs on Memory
Subsystem One of the DIMMs. Error The memory logging limit
has been reached.
1. Check the IBM support
website for an applicable
retain tip or firmware update
that applies to this memory
error.
2. 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).
3. If the error still occurs on the
same DIMM, replace the
affected DIMM.
4. (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 296
and “Installing the system
board” on page 298).
5. (Trained service technician
only) Remove the affected
microprocessor and check the
microprocessor socket pins
for any damaged pins. If a
damage is found, replace the
system board (see “Removing
the system board” on page
296 and “Installing the system
board” on page 298).
6. (Trained Service technician
only) Replace the affected
microprocessor (see
“Removing a microprocessor
and heat sink” on page 284
and “Installing a
microprocessor and heat sink”
on page 286).
Memory DIMM Configuration Error
for One of the DIMMs on Memory
Subsystem One of the DIMMs. Error A DIMM configuration error
has occurred. Make sure that DIMMs are
installed in the correct sequence
and have the same size, type,
speed, and technology.
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IBM System x3400 M3 Types 7378 and 7379: Problem Determination and Service Guide