Apple powermac 8500 series 서비스 매뉴얼

 

 Troubleshooting

Symptom Charts/System 

 

 (Continued)

 

 - 9

 

System 

intermittently 

crashes or hangs

1 Verify system software is version 7.5.2 or later (PM8500/

120) or 7.5.3 or later (PM 8500/132, PM 8500/150, 

and WS 8550).

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 8500 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 processor card. 

8 Replace logic board. Retain DIMMs.