Chosen Solution
@jda3 that looks like it’s a bad main board. You will have to remove the back of your TV and take a look at all the ribbon cables as well as check for obvious damage to the boards. Check for charred components, leaking or domed looking capcitors etc. It is of course also possible that this is a failed panel. Post some images of your boards with your question so we can see what you see. Adding images to an existing question
