Microprocessor problemsv Follow the suggested actions in the order in which they are listed in the Action column until the problem issolved.v See Chapter 5, “Parts listing, System x3750 M4 Types 8722 and 8733,” on page 195 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 goes directly to thePOST event viewer when it isturned on.1. Check the IMM event log and resolve any errors that have occurred.Monitor and video problemsSome IBM monitors have their own self-tests. If you suspect a problem with yourmonitor, see the documentation that comes with the monitor for instructions fortesting and adjusting the monitor. If you cannot diagnose the problem, call forservice.v Follow the suggested actions in the order in which they are listed in the Action column until the problem issolved.v See Chapter 5, “Parts listing, System x3750 M4 Types 8722 and 8733,” on page 195 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 ActionTesting the monitor or video. 1. Make sure that the monitor cables are firmly connected.2. If the server is attached to a KVM switch, bypass the KVM switch to eliminateit as a possible cause of the problem; connect the monitor cable to the correctconnector on the rear of the server. If the video now works, replace the KVMswitch.3. Try using the monitor on a different server. If it still does not work, replace thecable, then the monitor.4. Make sure that the video driver is at the latest level.5. (Trained service technician only) Replace the system board.The monitor works when youturn on the server, but thescreen goes blank when youstart some applicationprograms.1. Make sure that:v The application program is not setting a display mode that is higher thanthe capability of the monitor.v You installed the necessary device drivers for the application.2. Run video diagnostics (see “Running the DSA Preboot diagnostic programs”on page 171).v If the server passes the video diagnostics, the video is good; see “Solvingundetermined problems” on page 189.v (Trained service technician only) If the server fails the video diagnostics,replace the system board.Chapter 4. Troubleshooting 181
