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Video (continued), Video – Motorola 660AV User Manual

Page 27

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Troubleshooting

Symptom Charts/Video

(Continued)

- 9

Video

(Continued)

Screen is black, audio

and drive do not

operate, but fan is

running and LED is lit

1 Remove peripherals and cards.

2 Remove expansion card.

3 Replace DRAM SIMMs. See Memory

4 manual.

5 Replace power supply.

6 Replace logic board.

Partial or whole

screen is bright and

audio is present, but

no video information

is visible

1 Replace monitor. Refer to appropriate monitor manual to

troubleshoot defective monitor.

2 Replace video cable.

3 Replace video card, if installed.

4 Clear parameter RAM. Hold down

during startup but before “Welcome To Macintosh”

appears.

5 Replace logic board. Retain customer’s SIMMs.