Monitor Problems - Lenovo ThinkServer sd350 Installation And Service Manual

Table 9. Memory problems and actions (continued)
Symptom
Multiple rows of DIMMs in a
branch are identified as failing.

Monitor problems

Some Lenovo monitors have their own self-tests. If you suspect a problem with your monitor, see the
documentation that comes with the monitor for instructions for testing and adjusting the monitor. If you
cannot diagnose the problem, call for service.
• 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 Lenovo 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.
Table 10. Monitor and video's symptoms and actions
The monitor and video's symptoms and actions table with one level of row and column headers.
54
Lenovo ThinkServer sd350 Server Type 5493, Lenovo ThinkServer n400 Enclosure Type 5495Installation and Service Guide
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.
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