Apple performa 400 series 서비스 매뉴얼

 

 Troubleshooting

Symptom Charts/Built-in Video - 3

 

No video

Check batteries. See “Battery Verification” in Additional 

Procedures.

Screen is dark, audio 

and at least one drive 

operate, fan runs, 

and LED is lit

1 Adjust brightness on monitor.

2 Replace monitor. Troubleshoot defective monitor. See 

Symptom Charts in appropriate monitor manual.

3 Replace video cable.

4 Replace VRAM SIMM. 

5 Replace logic board. Retain customer’s SIMMs.

6 Replace power supply.

Screen is dark, audio 

and drive do not 

operate, but fan runs 

and LED is lit

1 Remove expansion card, if present

2 Remove peripherals.

3 Replace SIMMs. Refer to Hardware/Memory.

4 Replace logic board. Retain customer’s SIMMs.

5 Replace power supply.