Well, I ran Snoopdos and it said it was failing because it couldn't find cybergraphics.library in libs:. So I pulled that off aminet (found it inside a CGX v2 update disk) and dropped the necessary library into libs:. Ran CGXMode again and it still didn't work - although Snoopdos was satisfied (no more "Fails" or anything to work with). So, I loaded the CGXInfo program and it told me I had 0 graphics board installed. I tried reinstalling my later v3 update of CGX but as zorro 2 although it doesn't crash it doesn't do anything (including even recognising the board) and as zorro 3 it just crashes as Workbench is loading.
I know the last owner used an OpalVision card. Could he have set any jumpers on the mobo which might be in conflict with the Cybervision? Clutching at straws now.
This is a bloody, expensive disaster. All I want to do is recapture the magic of my Amiga days, hook it up to the net, run AmIRC again, HAVE FUN. Instead it's been a nightmare.