LG gets hot and produces a split screen with mirror images.

[les.des.keller]

In the past week, our LG 50" TV will be running fine, and then the screen splits and the left half of the screen in on both sides. We run ROKU, but it will be there even if we unplug the ROKU. Let it cool, and it works fine until it gets hot again

 

[paulchezter]

There is a chance that the board has some bad capacitors that needs to be replaced. If you can contact a repairman or service center to further diagnose the problem, that will be better.