Checkpoints - IBM 7026-H80 - RS/6000 - 256 MB RAM Service Manual

The Power MAP deals with isolation of components to diagnose a power problem. The
nature of power problems can be related to powering on and down the system, or
power failures that can occur after power is turned on.
The Minimum Configuration MAP is used to locate defective components not found by
normal diagnostics or error-isolation methods. This MAP provides a systematic method
of isolation to the failing item or items.

Checkpoints

These servers use various types of checkpoints, error codes, and SRNs, which are
referred to throughout this book (primarily in Chapter 4, "Checkpoints" on page 137,
Chapter 5, "Error Code to FRU Index" on page 163, Chapter 6, "Loading the System
Diagnostics In Service Mode" on page 367, and Chapter 10, "Parts Information" on
page 471). These codes may 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 these servers.
Codes that can appear on the operator panel or in error logs are as follows:
Checkpoints
70
Service Guide
Checkpoints display in the operator panel from the time ac power (dc power in
a dc-powered system) is connected to the system until the AIX login prompt is
displayed after a successful operating system boot. These checkpoints have
the following forms:
8xxx 8xxx checkpoints display from the time ac power (dc power in a
dc-powered system) is connected to the system until the OK prompt is
displayed by the service processor on the operator panel display.
(Several 9xxx checkpoints are displayed just before the OK prompt
displays.)
9xxx 9xxx checkpoints are displayed by the service processor after the
power-on sequence is initiated. A system processor takes over control
when 91FF displays on the operator panel.
Exxx Exxx checkpoints indicate that a system processor is in control and is
initializing the system resources. Control is being passed to AIX when
E105 (normal mode boot) or E15B (service mode boot) displays on the
operator panel.
Note: Location code information may also display on the operator
panel during this time.
0xxx 0xxx codes are AIX checkpoints and configuration codes. Location
codes may also be shown on the operator panel display during this
time.
2xxx 2xxx codes are AIX checkpoints and configuration codes. Location
codes may also be shown on the operator panel display during this
time.