We have an old TV that is used exclusively for watching DVDs and VHS tapes. Never bothered to hook up a converter box to it, but now I think I want to. Problem is, there's a real rat's nest of cables ...

That means that even digital TV sets and older sets hooked up to converter boxes need to be set to "re-scan" the airwaves. New TVs and the converter boxes have menu options, accessible through their ...