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 x3500 Type 7977,” on page 41 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 or powersupply powerproblem.1. Make sure that the system board is connected to thepower backplane.2. Remove and replace one power supply at a time.3. View the system-error log (see “Error logs” on page100).Lit Lit Off Standby powerproblem. 1. View the system-error log (see “Error logs” on page100).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 page100).2. Press the power-control button on the operatorinformation panel.3. Remove the optional Remote Supervisor Adapter IISlimLine, and try to turn on the server.4. (Trained service technician only) Replace the systemboard.Lit Lit Lit The power is good. No action is necessary.Diagnostic programs, messages, and error codesThe diagnostic programs are the primary method of testing the major componentsof the server. As you run the diagnostic programs, text messages and error codesare displayed on the screen and are saved in the test log. A diagnostic textmessage or error code indicates that a problem has been detected; to determinewhat action you should take as a result of a message or error code, see the table in“Diagnostic error codes” on page 140.Running the diagnostic programsTo run the diagnostic programs, complete the following steps:1. If the server is running, turn off the server and all attached devices.2. Turn on all attached devices; then, turn on the server.3. When the prompt F1 for Configuration/Setup is displayed, press F1.138 IBM System x3500 Type 7977: Problem Determination and Service Guide
