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, System x3400 Types 7973, 7974, 7975 and 7976,” on page 87 to determinewhich components are customer replaceable units (CRU) and which components are field replaceableunits (FRU).v If an action step is preceded by “(Trained service technician only),” that step must be performed only by atrained service technician.System-error log message ActionSystem shutoff due to VRM over voltage 1. (Trained service technician only) Reseat the microprocessor.2. Replace the following components one at a time, in the ordershown, restarting the server each time:a. (Trained service technician only) Microprocessorb. (Trained service technician only) System boardSystem shutoff due to VRM under voltage 1. (Trained service technician only) Reseat the microprocessor.2. Replace the following components one at a time, in the ordershown, restarting the server each time:a. (Trained service technician only) Microprocessorb. (Trained service technician only) System boardSystem under recommended voltage for +12v 1. Reseat the following components:a. Hot-swap power supplies (if any are installed)b. (Trained service technician only) Power-supply cables onthe system board2. (Trained service technician only) Replace the system board.System under recommended voltage on +2.5v 1. Reseat the following components:a. Hot-swap power supplies (if any are installed)b. (Trained service technician only) Power-supply cables onthe system board2. (Trained service technician only) Replace the system board.System under recommended voltage oncontinuous +5v 1. Reseat the following components:a. Hot-swap power supplies (if any are installed)b. (Trained service technician only) Power-supply cables onthe system board2. (Trained service technician only) Replace the system board.System x started a RS485 connection with us Information only.We started a RS485 connection with remotesystem xInformation only.We will retry sending alert ID x; when acceptedby a remote system, it will have a different IDInformation only.Windows blue screen has been captured Information only.Chapter 2. Diagnostics 81
