Marks on screen

I’ve notice my Uconsole has this mark on top of the screen.

I havent used it yet, since i bought the version that comes without the Cm4 and im waiting for it to arrive
I just put it together and left it in a shelf

The cm4 i ordered should arrive the 06/04, till then i have no other way of knowing f the screen its good, which from the looks of it i doubt

What can i do?

Email Alex, he will help u regarding this issue