Microprocessor Problems - Lenovo System x3250 M4 Installation And Service Manual

Table 21. Memory problems and actions (continued)
• Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
• If an action step is preceded by "(Trained technician only)", that step must be performed only by a trained
technician.
• Go to the IBM support website at http://www.lenovo.com/support to check for technical information, hints,
tips, and new device drivers or to submit a request for information.
Symptom
Multiple rows of DIMMs in a
branch are identified as failing.

Microprocessor problems

Table 22. Microprocessor's symptoms and actions
• Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
• If an action step is preceded by "(Trained technician only)", that step must be performed only by a trained
technician.
Action
• All banks of memory are enabled. The server might have automatically
disabled a memory bank when it detected a problem, or a memory bank
might have been manually disabled.
• There is no memory mismatch when the server is at the minimum memory
configuration.
2. Reseat the DIMMs, and then restart the server.
3. Check the POST error log:
• If a DIMM was disabled by a systems-management interrupt (SMI), replace
the DIMM.
• If a DIMM was disabled by the user or by POST, reseat the DIMM; then, run
the Setup utility and enable the DIMM.
4. Check that all DIMMs are initialized in the Setup utility; then, run memory
diagnostics (see "Running DSA Preboot diagnostic programs" on page 99).
5. Make sure that there is no memory mismatch when the server is at the minimum
memory configuration..
6. Add one pair of DIMMs at a time, making sure that the DIMMs in each pair
match.
7. Reseat the DIMM.
8. Re-enable all DIMMs using the Setup utility, and then restart the server.
9. Replace the following components one at a time, in the order shown, restarting
the server each time:
a. DIMMs
b. (Trained technician only) Replace the system board
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. Reseat the DIMMs; then, restart the server.
2. Replace the failing DIMM.
3. (Trained technician only) Replace the system board
.
Chapter 4 Troubleshooting
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