if your power supply is busted and you have to source a new one, do the AT/ATX PS deal for your miggy. It's easy and cheap. At this point, for classic systems, i'd never replace a power supply with another original Amiga model unless I had another one lying around. To do otherwise would be a waste of money and time. Electrolytic caps don't last for ever and this hardware is old. Lots of good systems get tossed in the trash because of tired power supplies, do your self a favor and setup with a new one.