Lenovo System x3750 M4 Installation And Service Manual page 509

DIMM within the channel could not be determined.[S.51003] An uncorrectable memory error has
been detected during POST. Fatal Memory Error Occurred
Severity
Error
User Response
Complete the following steps:
1. If the system has recently been installed, moved, serviced, or upgraded, verify that the DIMM
is properly seated and visually verify that there is no foreign material in any DIMM connector
on that memory channel. If either of these conditions is found, correct and retry with the same
DIMM. (Note: The event Log might contain a recent 00580A4 event denoting detected change in
DIMM population that could be related to this problem.)
2. If no problem is observed on the DIMM connectors or the problem persists, replace the DIMM
identified by LightPath and/or event log entry.
3. If the problem recurs on the same DIMM connector, replace the other DIMMs on the same
memory channel.
4. Check the IBM support site for an applicable service bulletin or firmware update that applies
to this memory error.
5. If the problem recurs on the same DIMM connector, inspect connector for damage. If found,
replace the system board.
6. Replace the affected Processor.
7. Replace system board.
Related links
– "Removing a memory module" on page 232
– "Replacing a memory module" on page 233
– "Removing a microprocessor and heat sink" on page 283
– "Replacing a microprocessor and heat sink" on page 287
– "Removing the system board" on page 299
– "Replacing the system board" on page 301
• S.51006 [S.51006] A memory mismatch has been detected. Please verify that the memory
configuration is valid. : One or More Mismatched DIMMs Detected
Severity
Error
User Response
Complete the following steps:
1. Could follow an uncorrectable memory error or failed memory test. Check the log and service
that event first. DIMMs disabled by other errors or actions could cause this event.
2. Verify that the DIMMs are installed in the correct population sequence.
3. Disable memory mirroring and sparing. If this action eliminates the mismatch, check the IBM
Support site for information related to this problem.
4. Update UEFI firmware.
5. Replace the DIMM
6. Replace the processor.
Related links
Appendix C. UEFI/POST error codes
495