Hello I was wondering I have horizontal lines

This could be the screen itself, the main driver, and or the matrix decoder. You are best to take the set in for authorized service. They should have test boards and diagnostics to find out what exactly has failed.

Buying boards yourself to try could end up being very costly for no reason. Even if you guessed right, there may be the need to do some calibration procedures that you would not be able to do at home.

If the screen itself has failed, the cost would exceed the replacement cost of the set. The matrix board could be rather expensive if it must be replaced.

If you are lucky, it may be a simple cold solder connection or maybe a connector is not properly seated.

Jerry G.