Map 1540: Problem Isolation Procedures; Fru Identify Leds - IBM eserver p 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. Find the symptom in
the following table; then follow the instructions given in the Action column.

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 beacon LED (optional rack status beacon)
v Processor Subsystem drawer identify LED
v I/O drawer identify LED
v RIO port identify LED
v FRU identify LED
v Power subsystem FRUs
v Processor Subsystem 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 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 by
using the service processor LED Control Menu contained in the "System Information Menu" on page 490.
See "System Information Menu" on page 490 for information on how to use the LED Control Menu.
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 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 may be booted to the open firmware prompt
and the command FRU-LED-MENU was entered. A menu will appear that will allow you to turn on the
desired FRU identify LED. See the "System Power Control Menu" on page 486 for instructions on
setting up the boot mode to enable the boot to the open firmware prompt.
2. If the system is logically partitioned, the HMC must be attached. There is a function at the HMC that
allows any FRU identify LED to be flashed. See the "Hardware Service Functions" section of the
"Service Focal Point" chapter of the IBM Hardware Management Console for pSeries Installation and
Operations Guide, order number SA38-0590, for instructions on activating and/or deactivating a FRU
identify LED.
Symptom/Reference Code/Checkpoint
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Information for Multiple Bus Systems book.
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140 EserverpSeries 650 Service Guide
Problem Isolation Procedures
Action
Go to "MAP 1542: I/O Problem Isolation" on page 144.
Go to "MAP 154B: Insufficient Hardware Resources
Problem Isolation" on page 181.