Is your tv faulty ? It’s always best to have the TV checked in situ rather than to presume it’s at fault .In many instances the problem could be connection , software or peripheral device related .
It’s not easy to throw a large screen TV in the car , risking damage to the screen , only to find out that the TV tested ok in a workshop .Then when you get it home you find your fault is still present .In many instances , the fault needs to be observed in situ for a correct diagnosis .
Worse still , you could have bought a new TV for no reason and find that it wasn’t the TV at fault at all , you’d be surprised how often this would happen due to friends and neighbours advising that TV’s aren’t worth repairing …… they are , or at least , certainly worth a look