http://www.lickcreek.org/vizio-no-picture-just-sound-2/
Ever have a strange sound from the back of a VIZIO HDTV?
I have a VIZIO GV47 HDTV. It is 18 months old. When it has been on for several hours it begins to “squawk” – almost sounds like a calf moo – every few seconds in the small speaker box of the right speaker. Mute the TV and the sound continues. Everything else is perfect – audio, picture are fine. Just the annoying sound. Any ideas?
It’s an LCD
Your worst mistake was buying a Vizio