v Follow the suggested actions in the order in which they are listed in the Action column until the problemis solved.v See the parts listing in the Problem Determination and Service Guide 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.Symptom ActionThe CD or DVD is not workingcorrectly. 1. Clean the CD or DVD drive.2. Run the CD or DVD drive diagnostic programs.3. Reseat the following components one at a time, in the order shown, restartingthe server each time:a. CD or DVD driveb. CD or DVD drive cable4. Replace the following components one at a time, in the order shown, restartingthe server each time:a. CD or DVD driveb. CD or DVD drive cablec. CD or DVD drive backplaned. (Trained service technician only) System boardThe CD or DVD drive tray is notworking. 1. Make sure that the server is turned on.2. Insert the end of a straightened paper clip into the manual tray-releaseopening.3. Reseat the CD or DVD drive cable.4. Replace the CD or DVD drive.General problemsv Follow the suggested actions in the order in which they are listed in the Action column until the problemis solved.v See the parts listing in the Problem Determination and Service Guide 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.Symptom ActionAn LED is not working, or asimilar problem has occurred.If the part is a CRU, replace it. If the part is a FRU, the part must be replaced by atrained service technician.58 System x3455 Types 7984 and 7986: Installation Guide