'''++ion39++''' This error sounds like a bad audio amp and no surprises there since those are usual skimped on. It is located on the main board. Since Vizio is at best a mediocre company with mediocre support and there are no schematics etc. available, your best bet would be to try a new main board. of course try a reset by unplugging all inputs. Unplug the TV and hold the power button for 30-45sec. Then plug the TV back in and only one video source. See if that changes anything.