When I bought one of these small, cheap, old-fashioned cathode-ray TV sets on sale to watch while on my exercise machine, I had no idea how high-tech and computerized even these obsolete sets had become. Nor was this a blessing. I could not even turn the set on and get a channel without reading a 60-page instruction book. If the truth be known, I could not do it even after trying to make some sense out of the instructions. The next time my computer guru came over to help me with my computer problems, I asked him to set up...