52" vizio has no picture....no menu....no display. turns on and lcd is "back lit" but nothing ever displays. Once on, I cant turn it off without unplugging. does not respond to any remote inputs or side control inputs. someone tells me its the LDVS (LCD controller) Found a replacement online. saw a picture of it. Cant find it in the TV itself!! Where might this be hiding and is the most likely cause of the above problem?