Friend of mine wrapped the expansion bus on his Electron in silver foil. I've no idea what possessed him, but I do know it never ran again. Just looked it up,

Friend of mine wrapped the expansion bus on his Electron in silver foil. I've no idea what possessed him, but I do know it never ran again. Just looked it up, and it had 18V AC on pins 1 and 2. So yeah, a kit kat wrapper will do that.