|I am sure you have power to the house. You could still have an issue with a circuit, outlet or power strip. I have seen folks assume there is power to a receptacle because the room lights are on. That may not be the case. Could be part of a GFI circuit or on a wall switch.|
I don't think anyone here would have a schematic for the TV but who knows. I would try Google.
One other comment. We here at CN have no way of knowing what a poster's skill set is.