v Follow the suggested actions in the order in which they are listed in the Action column until the problem issolved.v See Chapter 4, “Parts listing, System x3690 X5 Types 7147, 7148, 7149, and 7192,” on page 249 to determinewhich 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 aTrained service technician.Symptom ActionThe server does not start.(Continued)If the Channel E power LED is lit, check components in the following order:1. (Trained service technician only) Remove the all microprocessors. (Trainedservice technician only) toggle the switch block (SW2), switch 3 to allow theserver to power-on. See Table 3 on page 22 for the location of the SW2 switchblock on the system board. Try restarting the server. If the server starts,reinstall the microprocessors one at a time, starting the server each time, toisolate the defective device.2. (Trained service technician only) Replace microprocessor.3. (Trained service technician only) Replace the system board.If the Channel F power LED is lit, check components in the following order:1. Remove the memory tray. Try restarting the server. If the server starts, reinstallthe memory tray. Restart the server. if the problem remains:2. Replace any failing device.3. (Trained service technician only) Replace the system board.If the Channel G power LED is lit, check components in the following order:1. Remove the DIMMs from the system board. Try restarting the server. If theserver starts, reinstall the each DIMM pair that was removed one pair at atime, starting the server each time, to isolate the defective device.2. Replace any failing DIMMs.3. (Trained service technician only) Replace the system board.The server does not turn off. 1. Determine whether you are using an Advanced Configuration and PowerInterface (ACPI) or a non-ACPI operating system. If you are using a non-ACPIoperating system, complete the following steps:a. Press Ctrl+Alt+Delete.b. Turn off the server by pressing the power-control button and hold it downfor 5 seconds.c. Restart the server.d. If the server fails POST and the power-control button does not work,disconnect the ac power cord for 20 seconds; then, reconnect the ac powercord and restart the server.2. If the problem remains or if you are using an ACPI-aware operating system,suspect the system board.The server unexpectedly shutsdown, and the LEDs on theoperator information panel arenot lit.See “Solving undetermined problems” on page 245.64 System x3690 X5 Types 7147, 7148, 7149, and 7192: Problem Determination and Service Guide