This was really fascinating and I think it might account for what happens occasionally on one of my boxes. I usually turn the box off when not in use because I don't really use it all that often. Sometimes then when I turn the TV and the box on, all I get is dead air. I end up having to turn the box on and off a couple of times and play around with it. Frankly, I'm not sure what I finally do to get it on, but it does always come on.
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