I'm sure this has been mentioned elsewhere but I remember having to open up the back of the television to find the burned out vacuum tube. A dead TV was as big of a problem back then as it is today ;-) If we couldn't figure out which tube was bad, we'd have to take several of them out then drive down to the drug store where there was a big console where you could plug in vacuum tubes to test them. Once you found the bad one, you bought a new one, went back home to plug it in, and you were back in bidness'.
Also, the TV would hum when it was on, and just when you turned it on it made this high pitched whine that I can still hear today.