S.51006 [S.51006] A memory mismatch has been detected. Please verify that the memory configuration is
valid.
Explanation: 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 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, according to the service information for
this product.
3. Disable memory mirroring and sparing. If this action eliminates the mismatch, check IBM Support site for
information related to this problem.
4. Reflash UEFI firmware.
5. Replace DIMM,if problem persists,(Trained Service technician only)replace memory card identified by event log
entry.
S.58008 [S.58008] A DIMM has failed the POST memory test.
Explanation: DIMM Failed Memory Test
Severity: Error
User response: Complete the following steps:
1. Refer to TIP H212293 for minimum code level.
2. Check the IBM support site for an applicable retain tip or firmware update that applies to this memory error.
3. Swap one of the affected DIMM with a similar DIMM (size/type) on a different channel.
4. Re-enable all DIMM slots.
5. If the failure remains on the original slots, replace the DIMM that was not moved. if the failure follows the DIMM
that was moved, replace the DIMM that was swapped.
6. If the problem re-occures with the same DIMM connector, inspect the DIMM connector for foreign material. If
damaged, replace the Memory card.
S.68005 [S.68005] An error has been detected by the the IIO core logic on Bus %. The Global Fatal Error
Status register contains %. The Global Non-Fatal Error Status register contains %. Please check error
logs for the presence of additional downstream device error data.
Explanation: Critical IOH-PCI Error
Severity: Error
User response: Complete the following steps:
1. Check log for a separate error for an associated PCIe device and service that error.
2. Check IBM support site for an applicable RETAIN tip or firmware update for the system or adapter that applies
to this error.
3. (Trained Service technician only) Replace IO board.
S.51006 • S.68005
Appendix C. UEFI/POST error codes 1019
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