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Troubleshooting Symptom Charts/System - 8
System
intermittently
crashes or hangs
1 Verify system software is version 7.5.2 or later (Power
Macintosh 7200/75 or 7200/90) or 7.5.3 or later (Power
Macintosh 7200/120 or WS 7250/120).
2 Verify DIMMs are noncomposite.
3 Verify software is known-good. Do a clean install of the
system software.
4 Verify software is Power Macintosh 7200/WS 7250
compatible (contact developer). Also, try booting with
extensions off to determine if there are system init problems.
5 Clear parameter RAM. Hold down <Command> <Option> <P>
<R> 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 logic board. Retain DIMMs.