<Well, the mains transformer is wired OK; it happily takes the 240V in and <spits out something (?) like 8VAC, 16VAC and respectively. The 16VAC then <goes through what I assume is a bridge rectifier, and out comes approx. <+32VDC and -32VDC. The snag *is* that it's meant to be supplying 16, not <32v! The 8v rail, fortunately, is fine. Fix that! That 32v is way to high and will snuff the regulators used for +/-12v. I would expact something closer to 22v DC. Also the caps used would be stressed if subjected to that for an extended time. It sounds like the power is wired wrong. <Methinks that the previous owner may have been a little naughty with the <wiring; but I'm not confidant enough with electronics to play with it <too much. This is one machine I don't want to risk blowing up! :) Sounds that way. Get help from someone on your side of the pond if your in over your head as that's a fine machine. With 64k of ram and software it's still pretty useful. At least mine still earns it's keep. Allison