I'm doing my first Mac project - fitting a G3/600mhz logic board from an iMac with PAV issues into an ATX case using this site http://www.cryogenius.com/hardware/imac/ and others as a guide. It all works a treat (including the soft boot setup) except that the screen is green and fuzzy as per the photo. I've tried the setup with a 400DV logic board and the display is perfect. I've tested the 600 board in another iMac and its also working fine.
I'm wondering if there was a slight change in the video wiring in the later model iMacs. I've searched but can't find any video pinout info on the later model boards - only Rev E 350/400DV's. Does anyone have any clues about this?