IBM 72335LU - System x3850 M2 Installation Manual

Also see for 72335LU - System x3850 M2: User guide

Contents

Microprocessor problemsv Follow the suggested actions in the order in which they are listed in the Action column until the problemis solved.v See the parts listing in the Problem Determination and Service Guide to determine which components arecustomer 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 startup (boot)microprocessor is not workingcorrectly.1. Correct any errors that are indicated by the light path diagnostics LEDs (see“Light path diagnostics” on page 56).2. Make sure that the server supports all the microprocessors, and that themicroprocessors all match in speed and cache size.3. Make sure that the microprocessor 1 is seated correctly.4. Reseat the following components:a. Microprocessor 1b. Microprocessor VRMsc. Microprocessor board5. If there is no indication of which microprocessor has failed, isolate the error bytesting with one microprocessor at a time.6. Replace the following components one at a time, in the order shown, restartingthe server each time.a. (Trained service technician only) Microprocessor 1b. Microprocessor VRMsc. (Trained service technician only) Microprocessor board7. (Trained service technician only) If multiple error codes or light path diagnosticsLEDs indicate a microprocessor error, reverse the locations of twomicroprocessors to determine whether the error is associated with amicroprocessor or with a microprocessor socket. Also reverse the locations ofthe VRMs.v If the error is associated with a microprocessor, replace the microprocessor.v If the error is associated with a VRM, replace the VRM.v If the error is associated with a microprocessor socket, replace themicroprocessor board.Monitor problemsSome IBM monitors have their own self-tests. If you suspect a problem with yourmonitor, see the information that comes with the monitor for instructions for testingand adjusting the monitor. If you cannot diagnose the problem, call for service.Chapter 6. Solving problems 49