I've been reading this thread for the last year or so, trying all of the 'codes' and so far, none have worked with my Cox HD/DVR controller and my 32" Protron TV (from ShopNBC). I think that Shop NBC sucks for not forcing Protron to give out the codes and, even though I love the TV (though the speakers are terribly tinny) Protron's idea of customer service must have been learned from the Japanese around 1960 when their level of manufacturing was about the level of 'wind up mice'. Protron folks has zero, nada, zip concern for anyone, otherwise the SOB's would have posted their codes on their web site. I just did a Google search and found their web site (it wasn't easy) although the name is simple enough (www.Protron.com) and left them an email message asking them to both create a 'click' on their web site telling us the darn codes as well as posting to this forum all of their codes.
We'll see what they do and I'll do a follow up.
I don't know squat about codes but, it seems that each TV should have only one set of codes, whether 2,3,4,5 or however many numbers. The darn things should not be secret so that this long of a forum has to exist, just to find them.