A relic'd partscaster Tele with a history of random signal loss in for a while-you-wait repair. This has been through a couple other shops in the area and ended up on my bench for an emergency fix last week. I did the usual checking of all connections by eye, with a meter, reflowing suspect joints and physically stressing connections while the guitar was connected to an amp. I even checked the resistance of both pickups to make sure there wasn't a broken coil. Something I did ended up fixing the no-output issue, but I don't know exactly what was the cause. Not exactly the most reassuring of repairs, but I made sure to shake, prod and bang on the guitar as much as I could before it left with the player. Good thing it is a relic!
Note that the fix got the player through the gig so now only time will tell if whatever fix I did will last.