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Troubleshooting Symptom Charts/System
(Continued)
- 8
System
(Continued)
System
intermittently
crashes or hangs
1 Verify that system software is version 7.1.2 or later
(9150) or 7.5 or later (9150/120).
2 Verify SIMMs are noncomposite and installed in like pairs
(same size/speed).
3 Verify software is known-good and Power Mac compatible.
4 Verify a terminator or video card is installed in the PDS slot.
5 Clear parameter RAM. Hold down <Command> <Option> <P>
<R> during startup but before “Welcome to Macintosh”
appears.
6 Replace DRAM SIMMs. Refer to Memory manual.
7 Reseat ROM, RAM, and cache SIMMs, and reseat terminator
card.
8 Replace cache SIMM or DIMM.
9 Replace logic board. Retain SIMMs.
10 Replace power supply.