Apple Mac 8600 - Manual (Page 72)

Troubleshooting Symptom Charts/System - 9
System
intermittently
crashes or hangs
1 Verify system software is version 7.5.5 or later (PM 8600/
200, 9600/200, 9600/233) or 7.6.1 or later (PM 8600/
250, 8600/300, 9600/300, 9600/350, WS 9650).
2 Verify DIMMs are noncomposite.
3 Verify software is known-good. Do a clean install of system
software.
4 Verify software is Power Macintosh compatible (contact
developer). Also, try booting with extensions off to
determine if there are system init problems.
5 Clear parameter RAM. Hold down
during startup but before "Welcome to Macintosh"
appears.
6 Remove all DRAM DIMMs and try replacing them one at a
time to test. Replace any bad DIMMs.
7 Replace processor card.
8 Replace logic board. Retain DIMMs.