Apple WS 8150 Manuale Utente

 

 Troubleshooting

Symptom Charts/Video - 8

 

Screen is black, audio 

and drive operate, fan 

is running, and LED is 

lit

1 Adjust brightness on monitor.

2 Replace video cable.

3 Try using known-good RAM SIMMs.

4 Replace video card.

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

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

appears.

6 Replace SIMMs. 

7 Replace monitor. Refer to appropriate monitor manual to 

troubleshoot defective monitor.

8 Replace logic board. Retain customer’s SIMMs.

9 Replace power supply.