Troubleshooting | Symptom Charts/Video - 11 | |
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Video
Screen is black, boot tone is present, drive operates, fan is running, and LED is lit
1Adjust brightness on monitor.
2Clear parameter RAM. Hold down <Command> <Option> <P> <R> during startup but before "Welcome to Macintosh" appears.
3Reset Cuda chip. (Refer to The Cuda Chip in Basics.)
4Reset logic board. (Refer to Resetting the Logic Board in Basics.)
5Replace monitor cable.
6Remove all DRAM DIMMs and try replacing them one at a time to test. Replace any bad DIMMs.
7Test with
8Replace video PCI card.
9Replace processor card.
10Replace logic board. Retain customer's DIMMs.
