IBM x3655 Service Guide - Page 149

Microprocessor 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 Chapter 4, "Parts listing, System x3655, Type 7985," on page 97 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 server emits a continuous beep during POST, indicating that the microprocessor is not working correctly. 1. Correct any errors that are indicated by the LEDs (see "Light path diagnostics LEDs" on page 141). 2. Make sure that the server supports all the microprocessors and that the microprocessors match in speed and cache size. 3. (Trained service technician only) Make sure that microprocessor 1 is seated correctly. 4. (Trained service technician only) Reseat the microprocessors. 5. (Trained service technician only) Remove microprocessor 2 and restart the server. v If no beep code occurs, microprocessor 2 might have failed; replace the microprocessor. v If the beep code remains, remove microprocessor 1 and install microprocessor 2 in the connector for microprocessor 1; then, restart the server. If no beep code occurs, microprocessor 1 might have failed; replace the microprocessor. 6. (Trained service technician only) Replace the microprocessors. Chapter 5. Diagnostics 131