Old televisions used to be repaired, because (1) they were expensive enough that it was worth having them fixed, and (2) they had lots of discrete, detachable, fixable parts. Go back far enough, and the same thing was true of radios.
Televisions are now discarded rather than fixed because (1) they’re no longer expensive but (2) skilled labor to fix them is, and (3) they have few to no fixable parts. A new color television in the 1950s was about $1000, back when you could buy a car for that price.
By the time transistor radios came along, I doubt many people were still having radios repaired. At the same time, TV repairmen were common enough to be the butt of jokes, sitcom episodes, and even one or two Twilight Zone episodes.
I had a television from the 1990s for over 20 years until it finally and suddenly stopped working. (Picture-tube set, so the tube likely burned out.) The new set is cheaper (about $200 in 2015 vs. nearly $300 in the 1990s), bigger, and has no moving parts but a few pushbuttons. And that’s comparing to the 1990s set; there’s no comparison at all to one of those $1000 1950s color televisions. :smack: