Think I've fixed it. There was a permanent 12v coming in from the antenna motor pin. That's supposed to be an output pin from the radio to the antenna motor so was probably playing merry hell with the circuit. Snipped the wire and seems to be working correctly now.
Yeah, I can't imagine that was doing you any favours.
What about my welcome ect
Maybe you forgot to plug it in.
I think I need to up the agp voltage.
Heh, that's actually the size of SD card I was going to put in it :-D