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 7978 and 1913 server,” on page 89 to determine which components arecustomer 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 ActionFan n Failuren = the fan number 1. Make sure that the connector on the fan is not damaged.2. Make sure that the fan connector on the system board is notdamaged.3. Make sure that the fan is fully installed (press down on thefan).4. Reseat fan n.5. Replace fan n.Fan n Faultn = the fan number 1. Make sure that the connector on the fan is not damaged.2. Make sure that the fan connector on the system board is notdamaged.3. Make sure that the fan is fully installed (press down on thefan).4. Reseat fan n.5. Replace fan n.Hard Drive n Faultn = the hard disk drive number 1. Reseat hard disk drive n.2. Replace hard disk drive n.Hard drive n removal detected.n = the hard disk drive numberReseat hard disk drive n.Power supply n removedn = the power supply number 1. Reseat power supply n.2. Replace power supply n.3. Replace the power backplane.Power supply n faultn = the power supply number 1. If the server power-on LED is lit, perform the following steps:a. Reduce the server to the minimum configuration (see“Power-supply LEDs” on page 60).b. Reinstall the components you removed, one at a time,restarting the server each time.c. If the error reoccurs, the component you just reinstalled isdefective; replace the defective component.2. Reseat the following components:a. Power supply nb. (Trained service technician only) power backplane3. Replace the components listed in step 2, one at a time, in theorder shown, restarting the server each time.Power supply n AC power removedn = the power supply number 1. Make sure that the power cords are correctly connected to theserver and to a working electrical outlet.2. (Trained service technician only) replace the power supply n.3. (Trained service technician only) replace the power backplane.Power supply n fan faultn = the power supply number 1. Make sure that there are no obstructions, such as bundledcables, to the airflow on the power-supply fan.2. Replace power supply n.82 IBM System x3550 Type 7978 and 1913: Problem Determination and Service Guide
