Apple Mac 8600 - Manual (Page 76)

Troubleshooting Symptom Charts/Video - 13
Boot tone is present
and screen lights up,
but nothing is
displayed on screen
1 Reset Cuda chip. (Refer to The Cuda Chip in Basics for
instructions.)
2 Reset logic board. (Refer to Resetting the Logic Board in
Basics for instructions.)
3 Replace monitor cable.
4 Test with known-good monitor. Replace monitor if
necessary. Refer to appropriate monitor manual to
troubleshoot defective monitor.
5 Replace video PCI card.
6 Replace processor card.
7 Replace logic board. Retain customer's DIMMs.