Just after Christmas I purchased a new Samsung 50" QLED TV and upon powering up noticed a slight shading along the top and bottom of the screen. Most noticeable when the screen is displaying plain colours like sky, snow etc. After a couple of weeks I decided to exchange for a replacement which arrived on Thursday. Powered it up and it is displaying exactly the same. Not sure if this is something that may settle after usage. I do have a 5 year warranty on the TV and am thinking maybe to leave it a couple of months or if something else is interfering with it. It's not really really bad just a bit annoying. It does the same regardless what source I am using I.e. TV, SkyQ or xbox. Any tips will be really appreciated. Not sure how to post a pic on here to show what it's doing. Thanks in advance. Mark.