IBM 7985 Problem Determination And Service Manual

Microprocessor problemsv Follow the suggested actions in the order in which they are listed in the Action column until the problemis solved.v See Chapter 4, “Parts listing, System x3655, Type 7985 and 7943,” on page 93 to determine whichcomponents 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 atrained service technician.Symptom ActionThe server emits a continuousbeep during POST, indicatingthat the microprocessor is notworking correctly.1. Correct any errors that are indicated by the LEDs (see “Light path diagnosticsLEDs” on page 52).2. Make sure that the server supports all the microprocessors and that themicroprocessors match in speed and cache size.3. (Trained service technician only) Make sure that microprocessor 1 is seatedcorrectly.4. (Trained service technician only) Reseat the microprocessors.5. (Trained service technician only) Remove microprocessor 2 and restart theserver.v If no beep code occurs, microprocessor 2 might have failed; replace themicroprocessor.v If the beep code remains, remove microprocessor 1 and installmicroprocessor 2 in the connector for microprocessor 1; then, restart theserver. If no beep code occurs, microprocessor 1 might have failed; replacethe microprocessor.6. (Trained service technician only) Replace the microprocessors.42 IBM System x3655 Type 7985 and 7943: Problem Determination and Service Guide