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| Troubleshooting |
| Symptom Charts/Video (Continued) - 9 | |
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| Video (Continued) |
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Screen is black, audio | 1 | Replace video cable. | |||
and drive do not | 2 | Replace video card. | |||
operate, but fan is | 3 | Replace SIMMs. | |||
running and LED is lit | 4 | Replace logic board. Retain customer’s SIMMs. | |||
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| 5 | Replace power supply. | |
Partial or whole screen is bright and audio is present, but no video information is visible
1Replace video cable.
2Replace video card.
3Clear parameter RAM. Hold down <Command> <Option> <P> <R> during startup but before “Welcome to Macintosh” appears.
4Replace monitor. Refer to appropriate monitor manual to troubleshoot defective monitor.
5Replace logic board. Retain customer’s SIMMs.
