I agree with Old Turkey. It sounds like a tv problem. Many models of Samsungs tv's have had issues with bad capacitors. This is a design flaw on the power supply board in the tv. Samsung was using capacitors with to low of a voltage rating which eventually causes the capacitors to fail. If you look at the power supply board , you can usually tell by looking at the capacitors if any are faulty. They usually will bulge at the top and may even start leaking. So I would check the power supply board for issues first.