IBM pSeries 630 6C4 Service Manual page 47

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 the following:
v Rack identify LED
v CEC drawer identify LED
v I/O drawer identify LED
v RIO port identify LED
v FRU identify LED
– Power subsystem FRUs
– CEC subsystem FRUs
– 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 can be flashed when the system is in the failed state with power on by
using the service processor LED Control Menu shown in "System Information Menu" on page 376.
Any identify LED in the system can also be flashed by using the "Identify and Attention Indicators" task in
diagnostics. The procedure to operate the "Identify and Attention Indicators" task in diagnostics is outlined
in the RS/6000 Eserver pSeries Diagnostic Information for Multiple Bus Systems.
If the service processor menus and the AIX diagnostics are not available, the FRU identify LEDs can be
flashed by one of following:
v If the system is configured as a full system partition, boot to the open firmware prompt. See the "System
Power Control Menu" on page 372 for instructions on setting up the boot mode to enable the boot to the
open firmware prompt. To display a menu that will allow you to turn on the desired FRU identify LED,
type FRU-LED-MENU on the command line.
v If the system is logically partitioned, the HMC must be attached. For instructions on activating and
deactivating a FRU identify LED, see the Service Focal Point chapter of the IBM Hardware
Management Console for pSeries Installation and Operations Guide, order number SA38-0590.
Chapter 1. Reference Information
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