Tube TV sets...When they went on the blink, you took all the tubes out of the sockets, put them in a shoebox & went down to the drugstore. They had a machine on top of a cabinet. You just stuck each tube into one (of many) sockets & pressed the "Test" button...I know some of you think I'm making all this up...
I remember my father taking those tubes to the hardware/appliance store. If that didn't work, you called the TV repairman.
