Apple performa 400 series Instruction De Maintenance
Troubleshooting
Symptom Charts/Built-in Video - 3
Built-in Video
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.