Lenovo ThinkServer RD240 (English) Installation and User Guide - Page 109
Monitor problems
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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. • 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 the Hardware Maintenance Manual 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 Testing the monitor The screen is blank. Action 1. Make sure that the monitor cables are firmly connected. 2. Try using a different monitor on the server, or try using the monitor that is being tested on a different server. 3. Run the diagnostic programs. If the monitor passes the diagnostic programs, the problem might be a video device driver. 4. (Trained service technician only) Replace the system board. 1. If the server is attached to a KVM switch, bypass the KVM switch to eliminate it as a possible cause of the problem: connect the monitor cable directly to the correct connector on the rear of the server. 2. Make sure that: • The server is turned on. If there is no power to the server, see "Power problems" on page 99. • The monitor cables are connected correctly. • The monitor is turned on and the brightness and contrast controls are adjusted correctly. • No POST errors are generated when the server is turned on. 3. Make sure that the correct server is controlling the monitor, if applicable. 4. See "Solving undetermined problems" on page 102. Chapter 7. Troubleshooting 97