v Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
v If an action step is preceded by “(Trained technician only),” that step must be performed only by a trained
technician.
v Go to the IBM support website at http://www.ibm.com/supportportal/ to check for technical information, hints,
tips, and new device drivers or to submit a request for information.
Diagnostic
code Message Description Action
S.51006 [S.51006] A memory mismatch
has been detected. Please verify
that the memory configuration
is valid.
One or More Mismatched
DIMMs Detected.
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 34).
S.51009 [S.51009] No system memory
has been detected.
No Memory Detected.
1. Make sure that there is at least
one DIMM installed in the server.
2. If there are no memory fault
recorded in the logs and no
DIMM connector error LEDs are
lit, make sure that all DIMM
connectors are enabled by using
the Setup utility or the Advance
Settings Utility (ASU).
3. Reinstall all DIMMs in the correct
population sequence (see
“Installing a memory module” on
page 34 for more information).
Chapter 4. Troubleshooting 129
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