Fru Isolation; Fru Identify Leds - IBM pSeries 670 Service Manual

FRU Isolation

For a list of error codes and recommended actions for each code, see Chapter 5, "Error Code to FRU
Index", on page 345. These actions can refer to Chapter 10, "Parts Information", on page 941, Chapter 3,
"Maintenance Analysis Procedures (MAPs)", on page 111, or provide informational message and directions.
If a replacement part is indicated, direct reference is made to the part name. The respective AIX and
physical location codes are listed for each occurrence as required. For a list of location codes, see "AIX
and Physical Location Code Reference Tables" on page 57.
Note: AIX location codes are not available when the running operating system is Linux.
To look up part numbers and view component diagrams, see Chapter 10, "Parts Information", on page 941.
The beginning of the chapter provides a parts index with the predominant field replaceable units (FRUs)
listed by name. The remainder of the chapter provides illustrations of the various assemblies and
components that compose Eserver pSeries 670 servers. The illustrations are ordered with processor
subsystem components listed first, then I/O subsystem, and then accessories.

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 Processor subsystem drawer identify LED
v I/O drawer identify LED
v RIO port identify LED
v FRU identify LED
– Power subsystem FRUs
– Processor 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 processor subsystem 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 processor subsystem is in the failed state and
power is on) by using the service processor LED Control Menu contained in the System Information Menu
of the privileged user menus. To use operate the LED Control Menu, see page 730.
Any identify LED in the system can also be flashed by using the Identify and Attention Indicators task in
diagnostics. The procedure to use the Identify and Attention Indicators task in diagnostics is outlined in
RS/6000 and Eserver pSeries Diagnostic Information for Multiple Bus Systems.
If the service processor menus and AIX diagnostics are not available, the FRU identify LEDs can be
flashed by one of the following procedures:
v If the system is configured as a full partition, the system may be booted to the open firmware prompt
and the command FRU-LED-MENU entered. A menu displays that allows you to enable the desired
FRU identify LED. See "System Power Control Menu" on page 720 for instructions on setting up the
boot mode to enable the boot to the open firmware prompt.
v If the system is logically partitioned, the HMC must be attached. You can use the HMC to enable any
FRU identify LED to be flashed. See the IBM Hardware Management Console for pSeries Installation
and Operations Guide for instructions on activating and deactivating a FRU identify LED.
Chapter 2. Diagnostics Overview
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