You'll have to get a TV tech to diagnose it further. The parts are considered non user serviceable but if you are tackling this on your own try asking shopjimmy.com which board to change first.
My Samsung ES8000 Smart TV has exactly the same problem like this video. https://www.youtube.com/watch?v=7-t8rOKHBw4
Is There any solution at all for it. I am highly disappointed due to it.