Great news, Aldermog is resuscitated without a large bill! Maybe it's an idea to preventive swapping the fuses once a year?
What frustrated me is that if I'd just replaced the fuse that protects the power supply to the instruments I'd have solved the issue in 5 mins. I had a spare, new, fuse. But because it looked OK and I'd checked it with a meter, I "knew" it must be something else. So I didn't.
Too clever for my own good!!
