IBM System x3650 M3 4255 Service Manual page 50

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
0051006 DIMM mismatch detected
0051009 No memory detected
005100A No usable memory detected
32
IBM System x3650 M3 Types 4255, 7945, and 7949: Problem Determination and Service Guide
Action
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 match and are installed in
the correct sequence (see "Installing a memory
module" on page 217).
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 one or more DIMMs are installed in
the server.
2. Reseat the DIMMs and restart the server (see
"Removing a memory module (DIMM)" on page
217 and "Installing a memory module" on page
217).
3. Make sure that the DIMMs match and are
installed in the correct sequence (see "Installing a
memory module" on page 217).
4. (Trained service technician only) Replace the
microprocessor that controls the failing DIMMs
(see "Removing a microprocessor and heat sink"
on page 238 and "Installing a microprocessor and
heat sink" on page 240).
5. (Trained service technician only) Replace the
system board (see "Removing the system board"
on page 247 and "Installing the system board" on
page 248).
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 one or more DIMMs are installed in
the server.
2. Reseat the DIMMs and restart the server (see
"Removing a memory module (DIMM)" on page
217 and "Installing a memory module" on page
217).
3. Make sure that the DIMMs match and are
installed in the correct sequence (see "Installing a
memory module" on page 217).
4. Clear CMOS memory to ensure that all DIMM
connectors are enabled (see "Removing the
battery" on page 229 and "Installing the battery"
on page 231). Note that all firmware settings will
be reset to the default settings.