The price of mother board of tv

well ... is cheaper sometimes for that size to buy the new TV than the mother board as far as I know
 
Normally in the neighborhood of $140-$180, unless you have an early-model LG. If you do, walk away, as the board is $445.
 
depends on what TV he's talking about, but you're right, might be better to buy a new TV, and how does he know that it's the board that's bad?