I have only had my Samsung 52 inch tv for 17 months. Yesterday, the picture just went out. The power was still on, just no picture. I checked all the connections and still power with no picture.
The major cause for lost pictures in TV is caused by a vertical circuit problem. This is caused by bad soldiering of connections on the vertical output IC. Get the PC board and inspect around the vertical IC of any bad soldier connections. You can also have a technician help you. Alternatively, I suggest you this one www.tvrepairjacksonvillefl.com.