Map 1540: Problem Isolation Procedures; Fru Identify Leds - IBM P 615 series Service Manual

MAP 1540: Problem Isolation Procedures

These procedures are used to locate problems in the processor subsystem, I/O subsystem(s) or rack. If a
problem is detected, these procedures help you isolate the problem to a failing unit.

FRU Identify LEDs

This system is configured with an arrangement of LEDs that help identify various components of the
system. These include but are not limited to:
v Rack identify LED
v CEC drawer identify LED
v I/O drawer identify LED
v RIO port identify LED
v FRU identify LED
v Power subsystem FRUs
v CEC subsystem FRUs
v I/O subsystem FRUs
v I/O adapter identify LED
v DASD identify LED
The 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 to
locate the failing FRU more easily. Any identify LED in the system may be flashed when the system is in
the failed state with power on by using the service processor LED Control Menu contained in the "System
Information Menu" on page 238. For information on how to use the LED Control Menu, see "System
Information Menu" on page 238.
Any identify LED in the system may also be flashed by using the "Identify and Attention Indicators" task
through the AIX diagnostic programs. The procedure for operating the Identify and Attention Indicators task
of the AIX diagnostics is outlined in the chapter entitled "Tasks and Service Aids" in the RS/6000 Eserver
pSeries 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 be
flashed 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 prompt
and the FRU-LED-MENU command entered. A menu will display that will allow you to turn on the
desired FRU identify LED. For instructions on setting up the boot mode to enable the boot to the open
firmware prompt, see the "System Power Control Menu" on page 235.
110 EserverpSeries 615 Service Guide