IBM 8671 Hardware Maintenance Manual - Page 152
Memory, problems, Symptom, FRU/action, Verify, Microprocessor, startup, microprocessor, seated,
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Note: See "System" on page 162 to determine which components should be replaced by a field service technician. Memory problems Symptom FRU/action The amount of system memory displayed is less than the amount of physical memory installed. 1. Verify that: v The memory modules are seated properly. v You have installed the correct type of memory. v If you changed the memory, you updated the memory configuration with the Configuration/Setup Utility program. v All banks of memory on the DIMMs are enabled. The computer might have automatically disabled a DIMM bank when it detected a problem or a DIMM bank could have been manually disabled. 2. Check POST error log for error message 289: v If the DIMM was disabled by a system-management interrupt (SMI), replace the DIMM. v If the DIMM was disabled by the user or by POST: a. Start the Configuration/Setup Utility program. b. Enable the DIMM. c. Save the configuration and restart the computer. 3. DIMM. 4. System board. Note: See "System" on page 162 to determine which components should be replaced by a field service technician. Microprocessor problems Symptom FRU/action The computer emits a continuous tone during POST. (The startup (boot) microprocessor is not working properly.) 1. Verify that the startup microprocessor is seated properly. 2. Startup microprocessor. Note: See "System" on page 162 to determine which components should be replaced by a field service technician. Monitor problems Symptom FRU/action Testing the monitor. v See the information that comes with the monitor for adjusting and testing instructions. (Some IBM monitors have their own self-tests.) 142 xSeries 235 Type 8671: Hardware Maintenance Manual and Troubleshooting Guide