specifically the sound on my digital channels on my TV tuner do not work, other channels and channels through my DVD, HR20 and game systems work fine. I cannot imagine how this could be related to DTV download but there is no other correlating event as it worked fine before last week when I got the downloaded that activated the tuner in the HR20. Nothing I try gets the sound to work again. I called Mitsubishi and they immediatel;y asked me if I had Directv and then said that I had to call them back when I was in front of my TV which I can't easily do because their tech department is only open when I am at work except for a few hours at night and I just have not been home at that time yet. That question from them made me curious. Does anyone on here have a clue about this???? I have followed the manual, unplugged everything, replugged it, etc. There is no logical reason why the UHF/VHF plugged into the OTA tuner of the TV should not power the speakers on the digital channels if theyy are working on the analog channels as far as my limited knowledge knows, especially if it was working for 8 weeks and all of a sudden stopped. i also can't think of a logical reason why the latest download to the HR20 would affect it either, but it is the only event that occured and right after it my speakers uite working. I bought the extended warranty so even if this is somehow related good luck to Mitsubishi in proving it. But if anyone knows anything about this or has heard of or had a similar problem I would like to know.