We had an old cabinet TV that required a good smack in just the right spot on the left side to prevent most of the picture being green. As I recall the green-n

We had an old cabinet TV that required a good smack in just the right spot on the left side to prevent most of the picture being green. As I recall the green-ness varied in saturation from the left to the right for some reason. Over time the required smack became more and more forceful, and the smack target became smaller. Fortunately it kept working until the time came for a new TV though. Afterward I kind of missed that. (Sort of like I now miss the great triumph of getting my parents' old lawn mower to start.)