As the title says I when watching any HD movies using the amazon app in smartHub the sound is very very low. I have to turn the TV up to 60 and still it isn't very clear. I have narrowed it down to HD movies with the 5.1 icon, which is almost all of them. My daughters care bears show works just fine with the sound on the usual 10-20 setting.I do not have a sound bar or any external reciever. The sound is output from the TV speakers.
This issue is recent - not sure when but I know we have watched HD titles without issue before.
I have updated to the most recent firmware in the standard support menu of the TV, not the service menu or anything.
HD on TV works fine via my DirecTVbox.
I have googled and search AVS extensively for 2 days before posting this.