MAP 1540: Problem Isolation ProceduresThese procedures are used to locate problems in the processor subsystem, I/O subsystem(s) or rack. If aproblem is detected, these procedures help you isolate the problem to a failing unit.FRU Identify LEDsThis system is configured with an arrangement of LEDs that help identify various components of thesystem. These include but are not limited to:v Rack identify LEDv CEC drawer identify LEDv I/O drawer identify LEDv RIO port identify LEDv FRU identify LEDv Power subsystem FRUsv CEC subsystem FRUsv I/O subsystem FRUsv I/O adapter identify LEDv DASD identify LEDThe identify LEDs are arranged hierarchically with the FRU identify LED at the bottom of the hierarchy,followed by, the corresponding CEC or I/O drawer identify LED, and the corresponding rack identify LED tolocate the failing FRU more easily. Any identify LED in the system may be flashed when the system is inthe failed state with power on by using the service processor LED Control Menu contained in the “SystemInformation Menu” on page 238. For information on how to use the LED Control Menu, see “SystemInformation Menu” on page 238.Any identify LED in the system may also be flashed by using the “Identify and Attention Indicators” taskthrough the AIX diagnostic programs. The procedure for operating the Identify and Attention Indicators taskof the AIX diagnostics is outlined in the chapter entitled “Tasks and Service Aids” in the RS/6000 EserverpSeries Diagnostic Information for Multiple Bus Systems, order number SA38-0509.If the service processor menus and the AIX diagnostics are not available, the FRU identify LEDs may beflashed by one of following additional procedures.1. If the system is configured as a full partition, the system can be booted to the open firmware promptand the FRU-LED-MENU command entered. A menu will display that will allow you to turn on thedesired FRU identify LED. For instructions on setting up the boot mode to enable the boot to the openfirmware prompt, see the “System Power Control Menu” on page 235.110 EserverpSeries 615 Service Guide
