IBM x3655 Service Guide - Page 161

The following illustration shows the locations of the power-supply LEDs. AC power LED DC power LED The following table describes the problems that are indicated by various combinations of the power-supply LEDs and the power-on LED on the operator information panel and suggested actions to correct the detected problems. v Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved. v See Chapter 4, "Parts listing, System x3655, Type 7985," on page 97 to determine which components are customer 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 a trained service technician. Power-supply LEDs AC DC Operator information panel power-on LED Description Action Off Off Off No power to the 1. Check the ac power to the server. server, or a problem with the ac power source. 2. Make sure that the power cord is connected to a functioning power source. 3. Remove one power supply at a time. Lit Off Off DC source power 1. Remove one power supply at a time. problem. 2. View the system event/error log (see "Error logs" on page 116). Lit Lit Off Standby power problem. 1. View the system event/error log (see "Error logs" on page 116). 2. Remove one power supply at a time. 3. (Trained service technician only) Replace the power backplane. Lit Lit Flashing System power-on 1. View the system event/error log (see "Error logs" on problem. page 116). 2. Press the power-control button on the operator information panel. 3. Remove the optional Remote Supervisor Adapter II SlimLine, and try to turn on the server. 4. See "Solving power problems" on page 175. 5. (Trained service technician only) Replace the power backplane. 6. (Trained service technician only) Replace the system board. Lit Lit Lit The power is good. No action is necessary. Chapter 5. Diagnostics 143