A customer of mine lost 3 Dell Optiplex DL 270 used as POS terminals seemingly in a few hours just over new year one year around that time. That turned out to b

A customer of mine lost 3 Dell Optiplex DL 270 used as POS terminals seemingly in a few hours just over new year one year around that time. That turned out to be just the start as every one of these machines seemed to fail given enough time and we had 60 of them (some of might have been from an unaffected batch, I left later that year but remember some of them capacitors with "K" stamped on top instead of "+" and I think I never saw one with "K" break - or it might have been the other way around). We had the electrician come in to verify mains power, but luckily we soon caught whiff of the fact that Dell had a capacitor problem on these models. We overcame it with a little luck and by aggressively swapping machines as they failed, using out internal spares as a first line and immediately calling Dell for replacements for each and everyone of them.