Chapter 2. Diagnostics And Maintenance Procedures; Power And Attention Leds; Component Leds; Resetting The Leds - IBM pSeries 7311 D10 Service Manual

Chapter 2. Diagnostics and Maintenance Procedures

The system uses an integrated set of software diagnostic procedures to help isolate failing components
and system maintenance. This book, along with the RS/6000 Eserver pSeries Diagnostic Information for
Multiple Bus Systems, is the basis of the diagnostic procedures. Refer to the system service guide when
running diagnostics on your I/O subsystem.

Power and Attention LEDs

The Power and Attention LEDs provide a means to identify failing components in your subsystem. When a
failing component is detected in your system, the system's Attention LED is turned on.

Component LEDs

To further help you identify the failing component, all system components have individual LEDs that
indicate a failure when lit. The LEDs are either on the component itself or on the carrier of the component
(memory card, fan, memory module, or CPU).
The LEDs are either green or amber in color. A lit green LED indicates that the system or component is
receiving power. A lit amber LED identifies a system or component on the system. The amber LED can
also indicate when a system or component on a system has a problem or fault. For more information on
LEDs and their definitions, see Chapter 5, "Fault and Attention LEDs," on page 173.

Resetting the LEDs

To reset the LEDs, do the following:
1. Replace the failing component with the new component.
2. Log in as root user.
3. At the command line, type diag.
4. Select Task Selection.
5. Select Log Repair Action.
6. Select the device that was repaired. (If the device is not listed, select sysplanar0.)

Checkpoints

The system uses various types of checkpoints, error codes, and SRNs, which are referred to throughout
your system's service guide. These codes can appear in the service processor boot progress log, the AIX
error log, and the operator panel display. Understanding the definition and relationships of these codes is
important to the service personnel who are installing or maintaining the system.
Service Request Numbers (SRNs) are listed in the RS/6000 Eserver pSeries Diagnostic Information for
Multiple Bus Systems, order number SA38-0509.

FRU Isolation

For a list of error codes and recommended actions for each code, see your system's service guide. These
actions can refer to Chapter 4, "Parts Information," on page 161, "Maintenance Analysis Procedures
(MAPs)" on page 40, 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 locations codes, see your system's service guide.
39