Diagnostic Overview; Diagnostic Documentation - HP Model 748 - VME Workstation Handbook

After you have all answers possible, decide what's the most probable cause of the prob-
lem. Sometimes you'll arrive at several choices for a cause. For each choice, qualify it
against the answers to the questions above. The most probable cause is the one that logi-
cally justifies the correct answers to these questions.
Note any error or status messages, and then run the diagnostics. If the self-tests fail,
replace the assembly that is indicated.

Diagnostic Overview

Three types of diagnostics are available for the Model 743\744:
• Selftests are part of the Boot ROM code. They initialize and test the functional areas
needed to boot the operating system.
• Offline diagnostics are on the Support Tape, a separate tape or CD-ROM media. They
are ISL based and test the CPU, VME and I/O functions.
• Online diagnostics are supplied with the operating system, but require the operating
system to be booted. These diagnostics are called SupportWave and test the CPU, I/O
and several peripherals.

Diagnostic Documentation

Table 4-1 lists manuals that provide complete information.
Introduction to Troubleshooting
Troubleshooting
4-3