v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v If an action step is preceded by “(Trained technician only),” that step must be performed only by a trained
technician.
v Go to the IBM support website at http://www.ibm.com/supportportal/ to check for technical information,
hints, tips, and new device drivers or to submit a request for information.
Diagnostic
code Message Description Action
W.50001 [W.50001] A DIMM has
been disabled due to
an error detected
during POST.
DIMM Disabled. Note: Each time you install or remove a DIMM,
you must disconnect the server from the power
source; then, wait 10 seconds before restarting
the server.
1. Make sure the DIMM is installed correctly
(see “Installing a memory module” on page
250).
2. If the DIMM was disabled because of a
memory fault, follow the suggested actions for
that error event.
3. If no memory fault is recorded in the logs and
no DIMM connector error LED is lit, you can
re-enable the DIMM through the Setup utility
or the Advanced Settings Utility (ASU).
S.51003 [S.51003] An
uncorrectable memory
error was detected in
DIMM slot % on rank
%.
[S.51003] An
uncorrectable memory
error was detected on
processor % channel
%. The failing DIMM
within the channel
could not be
determined.
[S.51003] An
uncorrectable memory
error has been
detected during POST.
Fatal Memory Error
Occurred.
1. Check the IBM support website for an
applicable retain tip or firmware update that
applies to this memory error.
2. If the problem remains, replace the affected
DIMMs.
3. (Trained 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 290 and “Installing
the system board” on page 292).
4. (Trained 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.
5. (Trained technician only) Replace the affected
microprocessor (see “Removing a
microprocessor and heat sink” on page 279
and “Installing a microprocessor and heat
sink” on page 282).
S.51006 [S.51006] A memory
mismatch has been
detected. Please verify
that the memory
configuration is valid.
One or More
Mismatched DIMMs
Detected.
Note: Each time you install or remove a DIMM,
you must disconnect the server from the power
source; then, wait 10 seconds before restarting
the server.Make sure that the DIMMs have been
installed in the correct sequence (see “Installing a
memory module” on page 250).
34 IBM System x3650 M4 Type 7915: Problem Determination and Service Guide
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