Apple 7200/90, WS 7250/120, 7200/120 manual System

Models: 7200/90 WS 7250/120 7200/120

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Troubleshooting

 

Symptom Charts/System - 8

 

 

 

1

Verify system software is version 7.5.2 or later (Power

 

System

intermittently

 

Macintosh 7200/75 or 7200/90) or 7.5.3 or later (Power

crashes or hangs

2

Macintosh 7200/120 or WS 7250/120).

 

 

 

Verify DIMMs are noncomposite.

 

 

 

3

Verify software is known-good. Do a clean install of the

 

 

 

4

system software.

 

 

 

Verify software is Power Macintosh 7200/WS 7250

 

 

 

 

compatible (contact developer). Also, try booting with

 

 

 

5

extensions off to determine if there are system init problems.

 

 

 

Clear parameter RAM. Hold down <Command> <Option> <P>

 

 

 

 

<R> during startup but before "Welcome to Macintosh"

 

 

 

6

appears.

 

 

 

Remove all DRAM DIMMs and try replacing them one at a

 

 

 

7

time to test. Replace any bad DIMMs.

 

 

 

Replace logic board. Retain DIMMs.

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Apple 7200/90, WS 7250/120, 7200/120 manual System