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 8872 and Type 8874,” on page 93 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.Power-supplyLEDsOperatorinformationpanelpower-onLED Description ActionAC DCOff Off Off No power to theserver, or a problemwith the ac powersource.1. Check the ac power to the server.2. Make sure that the power cord is connected to afunctioning power source.3. Remove one power supply at a time.Lit Off Off DC source powerproblem 1. Make sure that the microprocessor tray is connectedto the power backplane.2. Remove one power supply at a time.3. View the system-error log (see “Error logs” on page18).Lit Lit Off Standby powerproblem 1. View the system-error log (see “Error logs” on page18).2. Remove one power supply at a time.3. (Trained service technician only) Replace the powerbackplane.Lit Lit Flashing System power-onproblem 1. View the system-error log (see “Error logs” on page18).2. Press the power-control button on the operatorinformation panel.3. (Trained service technician only) Use theforce-power-on jumper as a debugging aid (see “I/Oboard internal connectors and jumpers” on page 8) todetermine whether the information panel switch andcable are faulty.4. Remove the optional Remote Supervisor Adapter IISlimLine, and try to turn on the server.5. Reseat the microprocessor tray.6. (Trained service technician only) Replace themicroprocessor tray.Lit Lit Lit The power is good. No action.58 IBM xSeries 460 Type 8872 and xSeries MXE 460 Type 8874: Problem Determination and Service Guide
