Yeah, it looks like one of the led backlights went out.
Panel backlight issue TMK, that's pretttttttty bad.
My guess is that it's either an electrical problem (maybe a short, maybe not enough juice getting to it) or it was hit in transit. Seller swears it was a shipping screw up.
Edit: Just checked the box. There's definitely a sort of wrinkle on the bottom right corner of the box. And both the box and the cardboard they put around the box have it.
I rather not mess around with it. I can still return it and get a full refund, I think. And it's something I'm currently leaning towards unless it's an issue that will not get worse.
try sticking some folded small piece of paper between the bezel and the screen. Jam it up in there. It'll help some. Welcome to the lottery.
The price is just really tempting with the discount.