Apple quadra 800.ws 80 Service Manual

 

 Troubleshooting

Symptom Charts - 5

 

System 

intermittently 

crashes or hangs

1 Verify that system software is version 7.1 or later.

2 Verify that software is known-good.

3 Verify that software is System 7 compatible.

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

<R> during startup but before “Welcome To Macintosh” 

appears.

5 Replace SIMMs.  

6 Replace logic board.  Retain customer’s SIMMs.

7 Replace power supply.

During startup, 

following message is 

displayed, “This 

startup disk will not 

work on this 

Macintosh model...”

1 Verify that startup disk is good.

2 Attach LED cable to logic board.

3 Replace LED cable.

4 Replace logic board.  Retain customer’s SIMMs.