v Follow the suggested actions in the order in which they are listed in the Action column until the problemis solved.v See Chapter 3, “Parts listing, Type 4364, 4365, or 4366 server,” on page 15 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.System-event/error log message ActionSystem shutoff due to +1.5V CPU over voltage 1. Reseat the following components:a. (Trained service technician only) Microprocessorb. (Trained service technician only) System boardc. Power supply2. Replace the following components one at a time, in the ordershown, restarting the server each time:a. (Trained service technician only) System boardb. (Trained service technician only) MicroprocessorSystem shutoff due to +1.5V CPU under voltage 1. Reseat the following components:a. (Trained service technician only) Microprocessorb. (Trained service technician only) System boardc. Power supply2. Replace the following components one at a time, in the ordershown, restarting the server each time:a. (Trained service technician only) System boardb. (Trained service technician only) MicroprocessorSystem shutoff due to +2.5v over voltage. 1. Reseat the following components:a. (Trained service technician only) System boardb. Power supply2. (Trained service technician only) Replace the system board.System shutoff due to +3.3V over voltage 1. Reseat the following components:a. (Trained service technician only) System boardb. Power supply2. (Trained service technician only) Replace the system board.System shutoff due to +3.3V under voltage 1. Reseat the following components:a. (Trained service technician only) System boardb. Power supply2. (Trained service technician only) Replace the system board.System shutoff due to +12v over voltage. 1. Reseat the following components:a. (Trained service technician only) System boardb. Power supply2. (Trained service technician only) Replace the system board.System shutoff due to +12v under voltage. 1. Reseat the following components:a. (Trained service technician only) System boardb. Power supply2. (Trained service technician only) Replace the system board.110 IBM System x3250 Types 4364, 4365, and 4366: Problem Determination and Service Guide
