I had this happen last night to my BBC B+ 128K. The original PSU that was in it started smoking after I bought it on ebay about 5 years ago, so I got my carer back then to swap out the PSU from my BBC B+ 64K and it has been working until 2007.
Last night my Brother got my B+ 128K out of the attiic and plugged it, after about an hour of using it smoke started pouring out of the keyboard and underneath the PSU. So my Brother immediately switched it off at the mains, unplugged it and put it outside in a dry place since the smoke was a strong smell.
I have bought a PSU like this one here http://www.giz10p.co.uk/Electronic-Part ... rod_3.html
off ebay, I'm just wondering if 15 Amps on the +5v line would be too much amperage for the BBC's motherboard. Would it be safe to use it? I will be adding 2 disk drives to the PSU as well, so I'm assuming it would be ok to test it first before adding disk drives?
My current setup...
BBC B+ 128k with external DataCentre with 2GB CF Card, 64MB ARM7TDMI Co-Processor and BeebOPL.