I'm having trouble with My TV sound Viszio L37. The sound comes muffelled and some times has so much background. The commercials music always very high and I have to lower the Tv down then when the real show comes back, I can't hear the TV unless I rais the volume. I'm sick and tired of adjusting the Bass, Tune, The volume , checking the installation over and over , reading the manuals. I think I'm going to take back to Costeco.
I know thier are some hidden sound settings in the menu if you hit your menu key on your remote [or the one on the side of your tv],then goto to the tv and press both the channel up and down buttons simultaneously. You will see a factor menu, try changing the sound settings in there.
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This is typical of sound systems that come with TVs, especially flat screens. You need to look into purchasing an external sound system, such as a sound bar or a surround sound system. That way you can have better control of background/voice ratios.
It would be our pleasure in assisting you with that. We would recommend using our Volume Leveling feature which is available on our ViP222k, ViP612, ViP722k, and ViP922 receivers. Volume Leveling keeps the volume levels consistent between programming and commercials and
prevents drastic volume level changes when watching television between HD and SD
channels. Start by pressing the "Menu" button then pressing 6 for "System Setup" then 7 for "Audio Output". Select "Enable" below "Volume Leveling" then select "Done" to save these settings. If you're using a ViP922 receiver from the main menu select "Settings", select "Audio Output", and then enable Volume Leveling. This should help with the volume fluctuation issue you have been having. Thank you for being a valued DISH Network customer!
Phillip Chang DISH Network Customer Service Representative
The backlight is powered by its own supply (although it may receive input from the main supply) and it sounds like the main supply or one of its outputs has failed disabling the video and sound processing.
here, try the trouble shooting guide and let me know start with page 56, here is the link
Let me know when you have tried the trouble shooting for picture and sound even though this may not help, Also, since replacing the board didn't work, I will suggest going right to the manufacturer on this since the board was the only thing that really made sense for both to be out. Otherwise there might be a loose connection somewhere, anyway call them and let me know what they tell you and if they can't help, then you might have to take it in somewhere to have it checked, but the main board is the only thing that really makes sense
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In my case, turning the surround sound OFF is what fixed the problem. The bass contibutes most to the perception of the location of a sound. If surround is ON without surround speakers connected, the internal TV speakers can only take the place of what would be the front speakers in a surround system. So turn surround OFF and set your bass preference wherever you want it. That worked for me.