Troubleshooting Overview; Factory-Defined Boot Mode - Sun Microsystems SPARCstation 4 110 Service Manual

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C H A P T E R

Troubleshooting Overview

This chapter describes the factory-defined boot sequence. It also describes the
different types of SPARCstation 4 diagnostic firmware and software tools that are
available to you for troubleshooting; the chapter explains how the tools are related
and when to use them.
"Factory-Defined Boot Mode" on page 1
"After Power Is Switched On" on page 3
"Diagnostic Tools and When to Use Them" on page 7
"Power-On Self-Test" on page 7
"FORTH-Based PROM Diagnostics" on page 8
"FORTH Monitor" on page 10
"SunDiag System Exerciser" on page 11
2.1

Factory-Defined Boot Mode

The flowcharts in
factory-defined boot operation under the control of the OpenBoot™ PROM (OBP)
firmware.
The following sections describe the relationship between the various diagnostic
tools, and the role each tool plays during the system's factory-defined boot
sequence. The descriptions in the following sections assume you are using a
graphics monitor to view test results.
FIGURE 2-1
processing control, after power is switched on. Each figure diagrams the possible
paths for processing control, and the switch settings for the factory-defined boot
sequence. By examining the two flowcharts you can see where in the processing
sequence other diagnostic tests are available or are encountered.
and
FIGURE 2-1
(POST phase) and
FIGURE 2-2
outline the various diagnostics during a
FIGURE 2-2
(OBP phase) depict the flow of OBP
2-1