Years back when fixing a friends valve based Colour TV when I arrived to fix it the picture was often breaking up no vert or horiz hold. I approached the set and it started working perfectly again. Whatever I tested, tried etc could not bring the fault back. I said to the friend leave the set on and I will come back in an hour or so. On returning the friend commented that the set became faulty again just after you left. I reached the door into the room where the set was it was still failing. I approached the set and once again it started working again. Having assumed the set wanted to be nice to me only when I was present
I told my friend to give me a call when it stayed faulty. Finally a week or so later it stayed failed for long periods. My return didn't encourage it to work again either.
However the fault was traceable and found to be a hairline crack in the PCB, which had valves mounted on it, that was expanding and contracting due to temperature variations. Bridging the crack cured the problem. Did the set have feelings and like me at first.
or did it then sulk
because I didn't stay and look after it who knows?