I'm having the same issue on a un75mu8000 Conn's tech replaced the panel, tconn board, one connect and you can see frame by frame in any animation and the vertical banding still, he gave up
We'd be happy to look into this for you guys. Can you provide the full model code of your TV? Do the Vertical Lines appear across all sources?
I have the exact same issue with a 75 inch mu8000. So far Samsung has only managed to deny there is an issue. After reading this thread I can see why. They sent out a "tech" who said there's no problem with the picture because the issue isn't easily visible in the picture tests. What a joke...I should of went with Sony.