User Guide

Troubleshooting Symptom Charts/System - 3
System
System
intermittently
crashes or hangs
1 Verify that system software is version 7.5 or later.
2 Verify SIMMs are noncomposite and installed in like pairs
(same size/speed).
3 Verify that software is known-good.
4 Verify that software is PowerPC compatible (contact
developer).
5 Clear parameter RAM. Hold down <Command> <Option> <P>
<R> during startup but before “Welcome to Macintosh”
appears.
6 Replace SIMMs.
7 Replace logic board. Retain SIMMs.
8 Replace power supply.