Apple WS 8150 Manuale Utente

 

 Troubleshooting

Symptom Charts/Video 

 

 (Continued)

 

 - 9

 

Screen is black, audio 

and drive do not 

operate, but fan is 

running and LED is lit

1 Replace video cable.

2 Replace video card.

3 Replace SIMMs. 

4 Replace logic board. Retain customer’s SIMMs.

5 Replace power supply.

Partial or whole 

screen is bright and 

audio is present, but 

no video information 

is visible

1 Replace video cable.

2 Replace video card.

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

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

appears.

4 Replace monitor. Refer to appropriate monitor manual to 

troubleshoot defective monitor.

5 Replace logic board. Retain customer’s SIMMs.