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 4255, 7945, and 7949 server,” on page 157 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 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. Check the IBM support website for an applicable
retain tip or firmware update that applies to this
memory error.
2. Manually re-enable all affected DIMMs if the
server firmware version is older than UEFI v1.10.
If the server firmware version is UEFI v1.10 or
newer, disconnect and reconnect the server to the
power source and restart the server.
3. If the problem remains, replace the failing DIMM
(see “Removing a memory module (DIMM)” on
page 217 and “Installing a memory module” on
page 217).
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 247 and “Installing the system board” on
page 248).
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
247 and “Installing the system board” on page
248).
6. (Trained Service technician only) Replace the
affected microprocessor (see “Removing a
microprocessor and heat sink” on page 238 and
“Installing a microprocessor and heat sink” on
page 240).
0051004 DIMM presence detected read/write failure 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. Update the server firmware to the latest level (see
“Updating the firmware” on page 253).
2. Reseat the DIMMs.
3. Install DIMMs in the correct sequence (see
“Installing a memory module” on page 217).
4. Replace the failing DIMM.
5. (Trained service technician only) Replace the
system board.
Chapter 3. Diagnostics 31
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