| Troubleshooting |
| Symptom Charts/Video (Continued) - 9 |
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| Video (Continued) | |
Screen is black, audio | 1 | Remove peripherals and cards. | |
and drive do not | 2 | Remove expansion card. | |
operate, but fan is | 3 | Replace DRAM SIMMs. See Memory | |
running and LED is lit | 4 | manual. | |
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| 5 | Replace power supply. |
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| 6 | Replace logic board. |
Partial or whole | 1 | Replace monitor. Refer to appropriate monitor manual to | |
screen is bright and | 2 | troubleshoot defective monitor. | |
audio is present, but | Replace video cable. | ||
no video information | 3 | Replace video card, if installed. | |
is visible | 4 | Clear parameter RAM. Hold down <Command> <Option> <P> | |
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| <R> during startup but before “Welcome To Macintosh” |
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| 5 | appears. |
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| Replace logic board. Retain customer’s SIMMs. | |