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, Types 7871 and 1949,” on page 41 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.
Error code Description Action
0051003 Uncorrectable DIMM error
1. Refer to TIP H21455 for minimum code level.
2. Check the IBM support website for an applicable
retain tip or firmware update that applies to this
memory error.
3. Manually re-enable all affected DIMMs if the
server firmware version is older than UEFI v1.10.
If the server firmware version is UEFIv1.10 or
newer, disconnect and reconnect the server to the
power source and restart the server.
4. If the problem remains, replace the affected
DIMMs.
5. (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 assembly (see “Removing the
system-board assembly” on page 94 and
“Installing the system-board assembly” on page
95).
6. (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 assembly (see “Removing the
system-board assembly” on page 94 and
“Installing the system-board assembly” on page
95).
7. (Trained Service technician only) Replace the
affected microprocessor (See “Removing a
microprocessor and heat sink” on page 85 and
“Installing a microprocessor and heat sink” on
page 88).
0051006 DIMM mismatch detected. Make sure that the DIMMs have been installed in the
correct sequence (see “Installing a memory module”
on page 64).
Chapter 6. Diagnostics 149
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