I just read something I didn ' t know about Samsung and that I haven ' t tried myself yet either . Apparently HDR mode only works when you have your picture mode set to Standard or Movie mode . My tv room is a darker room so I ' ve always had mine set to Movie mode so if this is an issue , it never would have affected me anyways . Just thought I ' d post this for you even tho I know I ' m kind of grasping at straws now . I just felt bad when I read the problems you are having because we have the exact same tv and if yours was working the way mine does I ' m sure you ' d be extremely happy . and impressed ! Again , good luck . <| sep |> Gotta watch out for ye oldentyme herpes plus ye oldentyme abortion left a lot to be desired .