Long ago I had a part-time job fixing consumer electronics at a small,
independent retail store. Bill, the store's owner, did a big business
in TV sets and appliances like washing machines and refrigerators. In
those days, TV sets were 100% analog and were failure-prone because of
the less sophisticated design and assembly processes of the day, the use
of high-voltage at the CRT (picture tube), and the limitations of
vacuum tube and semiconductors of the day. So Bill pretty much had to
have a "service department" to repair the TV sets that he sold as well
as sets that he hadn't sold but that might need repair or (hopefully)
replacement with a new set.
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