Chosen Solution
i have ultra 4k hd curve tv that all of a sudden the top half of the picture screen is darker then the bottom half
@eunyove that definitely sounds like a backlight issue (possibly inverter circuitry on power board or the panel itself). Since this is a pretty new TV I would not even think about opening it without first checking any warranty status.
We had similar issues on the lower half of our Samsung 55” UVHD 4K curved picture view. We bought a 36” dehumidifier rod and placed behind & under TV. Problem solved! Cost $45
