Power 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 on the IBM System x DocumentationCD to determine which components are customer replaceable units (CRU) and which components are fieldreplaceable 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 power-control button doesnot work, and the reset buttondoes work (the server does notstart).Note: The power-control buttonwill not function until 20seconds after the server hasbeen connected to ac power.1. Make sure that the power-control button is working correctly:a. Disconnect the server power cords.b. Reconnect the power cords.c. (Trained service technician only) Reseat the operator information panelcable, and then repeat steps 1a and 1b.d. (Trained service technician only) If the server starts, reseat the operatorinformation panel. If the problem remains, replace the operator informationpanel.2. Make sure that the reset button is working correctly:a. Disconnect the server power cords.b. Reconnect the power cords.c. (Trained service technician only) Reseat the operator information panelcable, and then repeat steps 2a and 2b.v (Trained service technician only) If the server starts, replace the operatorinformation panel.v If the server does not start, go to step 3.3. Make sure that:v The power cords are correctly connected to the server and to a workingelectrical outlet.v The type of memory that is installed is correct.v The DIMMs are fully seated.v The LEDs on the power supply do not indicate a problem.v (Trained service technician only) The microprocessor is correctly installed.4. If you just installed an optional device, remove it, and restart the server. If theserver now starts, you might have installed more devices than the power supplysupports.5. Reseat the following components:a. DIMMsb. (Trained service technician only) Power backplane6. Replace the following components one at a time, in the order shown, restartingthe server each time:a. DIMMsb. Power supplyc. (Trained service technician only) Power backplaned. (Trained service technician only) System board7. See “Solving undetermined problems” on page 220.142 IBM System x3350 Type 4192 and 4193: Problem Determination and Service Guide
