IBM 84903bu User Manual - Page 82
Memory, problems
UPC - 000435882073
View all IBM 84903bu manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 82 highlights
Memory problems v Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved. v See the parts listing in the Problem Determination and Service Guide 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. Symptom Action The amount of system memory 1. Make sure that: that is displayed is less than the amount of installed physical v No error LEDs are lit on the front-panel assembly or on the system board. memory. v Memory mirroring does not account for the discrepancy. v The memory modules are seated correctly. v You have installed the correct type of memory. v If you changed the memory, you updated the memory configuration in the Configuration/Setup Utility program. v All DIMMs are enabled. The server might have automatically disabled a DIMM when it detected a problem, or a DIMM might have been manually disabled. 2. Check the POST error log for error message 289: v If a DIMM was disabled by a system-management interrupt (SMI), replace the DIMM. v If a DIMM was disabled by the user or by POST, run the Configuration/Setup Utility program and enable the DIMM. 3. Run memory diagnostics (see "Running the diagnostic programs" in the Problem Determination and Service Guide on the IBM xSeries Documentation CD). 4. Make sure that there is no memory mismatch when the server is over the minimum memory configuration (one 512 MB DIMM) and that you have installed the correct number of DIMMs (see the User's Guide on the IBM xSeries Documentation CD for information about installing optional memory modules). 5. Reseat the DIMMs. 6. Replace the following components one at a time, in the order shown, restarting the server each time: a. DIMMs b. (Trained service technician only) System board 68 xSeries 206m Types 8485 and 8490: Installation Guide