Lenovo ThinkServer RD240 Hardware Maintenance Manual - Page 29
Microprocessor problems, Monitor problems
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• Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved. • See the parts listing in Chapter 8 "Parts listing, RD240 Types 1045, 1046, 1047, and 1048" on page 93 to determine which components are customer replaceable units (CRUs) and which components are field replaceable units (FRUs). • If an action step is preceded by "(Trained service technician only)," that step must be performed only by a trained service technician. Symptom Action 3. Return the removed DIMMs, one pair at a time, to their original connectors, restarting the server after each pair, until a pair fails. Replace each DIMM in the failed pair with an identical known good DIMM, restarting the server after you reinstall each DIMM. Replace the failed DIMM. Repeat step 3 on page 17 until you have tested all removed DIMMs. 4. (Trained service technician only) Replace the system board. Microprocessor problems • Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved. • See the parts listing in Chapter 8 "Parts listing, RD240 Types 1045, 1046, 1047, and 1048" on page 93 to determine which components are customer replaceable units (CRUs) and which components are field replaceable units (FRUs). • If an action step is preceded by "(Trained service technician only)," that step must be performed only by a trained service technician. Symptom The server emits a continuous beep during the POST, indicating that the startup (boot) microprocessor is not working correctly. Action 1. Make sure that the server supports all the microprocessors and that the microprocessors match in speed and cache size. 2. (Trained service technician only) Reseat microprocessor 1. 3. (Trained service technician only) If there is no indication of which microprocessor has failed, isolate the error by testing with one microprocessor at a time. 4. Replace the following components one at a time, in the order shown, restarting the server each time: a. (Trained service technician only) Microprocessor 2 b. VRM 2 c. (Trained service technician only) System board 5. (Trained service technician only) If multiple error codes indicate a microprocessor error, reverse the locations of two microprocessors to determine whether the error is associated with a microprocessor or with a microprocessor socket. • If the error is associated with a microprocessor, replace the microprocessor. • If the error is associated with a VRM, replace the VRM. • If the error is associated with a microprocessor socket, replace the system board. Monitor problems Some 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. Chapter 5. Diagnostics 17
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