Troubleshooting | Symptom Charts/Video - 11 | |
|
|
|
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".
3Verify video card is installed and reseat card.
4Reset Cuda chip. (Refer to The Cuda Chip in Basics.)
5Reset logic board. (See Resetting the Logic Board in Basics.)
6Replace video cable.
7Remove all DRAM DIMMs and try replacing them one at a time to test. Replace any bad DIMMs.
8Replace video card.
9Test with
10Replace processor card.
11Replace logic board. Retain customer's DIMMs.
