Motorola 660AV ユーザーズマニュアル

 

 Troubleshooting

Symptom Charts/Video - 8

 

Screen is black, audio 

and at least one drive 

operate, fan is 

running, and LED is 

lit

1 Adjust brightness. See Adjustments chapter in appropriate 

monitor manual.

2 Check cables.

3 Verify that monitor is switched on.

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

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

appears.

5 Replace video cable.

6 Replace monitor. Refer to appropriate monitor manual to 

troubleshoot defective monitor.

7 Replace video card, if present

8 Replace SIMMs.

9 Replace logic board. Retain customer’s SIMMs.

10 Replace power supply.