Make sure that you connect both ends of the cables to the Amiga and pc before turning the power on. I once had the power on on both the Amiga and the pc. Connected the serial cable to the Amig, and then the pc. I couldnt get it in right away, sp I jiggled it a little.. A few sparks appeared, the pc died and then I felt the familiar smell of burnt electronics, and realized that the motherboard on the pc had just died by my hands..
Oh well, my 1200 survived so it wasnt a great loss.. :lol: