No sound for HD channels Denon 2307

Try identifying which caption is from the TV and which is from the cable box by turning the TV Closed Caption on and off while you have to sets of captioning. This will show you which closed caption never turns off.

I have 2 pro scans Comcast hd. On Comcast remote small button ( for me Its small circular button bottom right) HD ZOOM. (enter above it)

No,It happen because HD and Non HD together.Commercials are Non HD most of them.

Your TV is not at fault, it is showing you the difference between HD and non HD channels. HD TV's work great with HD scorces but don't usually look that great with standard definition, Also the non-HD channels are more likely to be heavily compressed which makes them look bad too.

Good evening! Go into your audio section of the Menu and make sure that SAP is off.....let me know how you did.

Best Buy owns some of the brands it sells. Best Buy currently has five private labels which include Insignia, Dynex, Init, Geek Squad, and Rocketfish. Insignia focuses on electronic equipment, including televisions, monitors, car stereos, home theater systems, and portable video and audio players.

The Best Buy televisions are made with substandard components. They are not produced with the same standard the orginal manufacture items.

With the factor of substandard pieces and flash/firmware glitches; it sound like you have a software problem.

I would contact the manufacture ASAP and have a field tech come by to update your television.

if you have a cable box then it is probably the resolution settings in the cable box, what type of cable box do you have

you have to make the alignment for all 3 formats....standard....1080i...and 480i

How are you hooked up? I.E. terrestrial, satellite, ?

If the channel on HD isn't strong enough to pull the signal, sound won't play because it isn't locked. Because you have sound on non hd it is a signal issue not the tv.

Your TV may not support your HD channel signal. Check with HD DVD & non-HD DVD players to confirm.