I have a Samsung UN65NU6900 QLED TV that has this super annoying thin black line running straight down the middle of screen – and I can’t figure out how to fix it myself (or if it’s even possible). I’ve seen video’s online but none of them address this particular picture problem. They suggest removing the back panel and checking the connection of the board. But I’m scared to do that if I don’t feel comfortable that it’s likely the problem/fix. Does anyone know how this can be fixed? Thank you so very much if you do!