This is insanity. I posted a while back my Q90T having a grid like discoloration. Went through samsung to see if they could fix it, tech came by and couldn't do anything. Luckily I bought a extended warranty through Walmart and they were able to get me a new TV. Since the q90t were not around, I was able to get a Qn90b. I got the new TV, and noticed 6 dark spots at the lower right part of the screen. I immediately sent it back and the warranty company sent me another. Guess what, same exact issues, but worse, there's an actual curved line, looks like a kids drawing. I can't believe this. This seems like a bad batch of screens.