Way back when I was an electronic tech at a university. At that time a number of departments I worked for had Apple IIe computers. From time to time they would break and I would be called in to look at them. Most times that was all I needed to do - look at them, and they would burst into life again. I got a bit of a (positive) reputation as a result. Funny thing is, most of those faults didn't come back!

My name's not Chuck by the way, and it only seemed to work like that for Apple IIe computers.