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.Error code Description ActionI9990305 An operating system was not found. 1. Make sure that a bootable operating system isinstalled. To determine whether an operatingsystem is one of the devices in the startupsequence, run the Configuration/Setup Utilityprogram (see the User’s Guide on the IBMSystem x3400 Documentation CD).2. Run the hard disk drive diagnostic tests.3. Reseat the following components, depending onthe server model:v Hot-swap models:a. Hard disk driveb. Hard disk drive cablec. Hard disk drive backplanev Simple-swap models:a. Hard disk driveb. Hard disk drive cable4. Replace the following components one at a time,depending on the server model, in the ordershown, restarting the server each time:v Hot-swap models:a. Hard disk driveb. Hard disk drive cablec. Hard disk drive backplanev Simple-swap models:a. Hard disk driveb. Hard disk drive cable5. (Trained service technician only) Replace thesystem board.I9990650 AC power has been restored. 1. Reseat the power cords.2. Check for interruption of the external power.3. Replace the power cords.4. For hot-swap models, replace the power supplybackplane.38 System x3400 Types 7973, 7974, 7975, and 7976: Problem Determination and Service Guide
