Thanks for the advice Gonk. I think it somewhat fixed itself. I remembered that when I press the 7.1 button, I would hear the same type of click when that input activates. I did that, and then everything went back to normal. Sticky relay? Don't know if it had anything to do with it, or a random occurence. Anyway, I'll keep an eye on it, since I have a good long warranty. Thanks again.