Horizontal Line on Samsung tv 40 inch 2017

[nicothebusinessperson]

I just bought this new TV yesterday and I saw this horizontal line on a white background. I tried to diagnose whether i can repeat the problem and it is still the same on a differenct black gray background. Should i return the tv and have a replacement unit? It became a whiteline when i open a white window.

 

[nicothebusinessperson]

http/tinypic.com/r/2lc0nxe/9 this is the link for the picture