'not well' Osborne 1 mk 2

All check out fine on multiple random tests, though I have to admit I'm sitting amongst the smell of singed plastic since it seems the interior of the machine has been metallised somewhat :-/ It didn't do that yesterday! Oh well, I'm still with the same problem.....fortunately I saw smoke before anything nasty happened! OK, so far we have +5V, clock signal and active address and data lines, or at least my probe makes the expected noises once I found somewhere to get a good 5V supply from, so I'd say the CPU is running and I have a problem after that. Normally at this point I'd go for video RAM, but the only obvious culprits for that are a pair of 6116s that live on the other daughterboard that supplies the monitor, and I've swapped them round and swapped in a known good 6116 chip...... The prices of new 'scopes almost made me run to the hills :) cheers -- Adrian/Witchy www.binarydinosaurs.co.uk - possibly the UK's biggest online computer museum www.snakebiteandblack.co.uk - ex-monthly gothic shenanigans :o(