I did the same - almost
It was a Burroughs device. I turned it on: nothing, checked the cable,plug, fuse all fine.
Called the engineer he arrived and turned it on immediately, no problem. What I didn't know (and it's an interesting design decision) was that there were two mains switches, the "normal" obvious one I'd been using for months on the front, a second one on the back that someone else must have found. I blame the cleaners...
Biting the hand that feeds IT
