The RS tandy model III circuit board is very weak and burns out like that, very terrible at solder rework. Better off find another board or a couple of donors? Oh, I have at least 4 pulls of those little switching PSU's but those are very common size and pinouts, I saw several in other devices with better current ratings. One was in Cipher external drive for example. BUT, you could in theory pull the newflagled 200W PS/2 style clone PSU's and rid the "humming" monster tranformer with regulators and caps and feed the floppy drive One thing I ASK: HOW come those clips can slip in those slotted vents (it's blocked by screening too!) and trap into their deadly short circuits act on that _VERTICAL_ board?! I thought that would be more possible if the boards were horizontal. That is what I'm talking about in those silver-grey clamshell with 9" mono monitor, space for 2 5.25" FDs, orange reset key, great keyboard, cutouts for 2 extra add on cards to interface with outside world for external boxens. Power rocker switch on right side just underside. I had it years ago but it blew up somewhere by stray static. No smoke to hint at all. Jason D. email: jpero(a)cgocable.net Pero, Jason D.