Apple 7100/80 Manuale Utente

 

 Troubleshooting

Symptom Charts/Video

 

 (Continued)

 

 - 8

 

Screen is dark, audio 

and drive do not 

operate, fan is 

running, and LED is 

lit

1 Remove peripherals.

2 Remove NuBus cards.

3 Replace DRAM SIMMs

4 Replace VRAM SIMMs.

5 Replace video card.

6 Replace power supply.

7 Replace logic board.

Partial or whole 

screen is bright and 

audio is present, but 

no video information 

is visible

1 Replace video cable.

2 Replace VRAM SIMMs.

3 Replace video card.

4 Replace monitor. Refer to appropriate monitor manual to 

troubleshoot defective monitor.

5 Replace logic board. Retain customer’s SIMMs.