I have the same problem with my TV. I am 5 months out of my warranty and can not get any help from Samsung. Looks like this is an ongoing problem even though they tell me they have never heard of this.
Hey, sorry if this has already been posted and answered, but i am new lol.
The other day my tv (above) has just received a small thin black line at the top of it going from 1 side to the other.
I've searched a bit on Google and noticed that other brands of TV have had this issue aswell.
I've tried switching the TV off from the mains, resetting the TV settings etc. But it has still appeared on all outputs.
Is there a solution to make it go away? Thanks guys/girls.