I remember reading online about Adrian Belew having a rig failure and they were trying to trouble shoot the problem. He had a really complex digital rig at the time and there was no way to do the show without it. That must have really sucked.
This happened to me yesterday, (in the studio, not on stage).Last night on the gig I spent the first half of the set wondering what was wrong with my fabulous amp, sounded all nasally and nasty but not in a good way.
Found my Wah Wah was already engaged when I stepped on it to Wah, and there was my glorious Goodsell Super 17 tone. Yes, this is the second time I’ve done this in the last year.