Hi everyone, I have mid-2013 27" iMac. About two months ago my display stopped working and I brought it to the apple store. Luckily I was still under warranty and they replaced it. However, since two weeks I am starting to see my screen burn-in. When i work with dark applications i see other applications I just used, burned in my screen, when I reboot my mac I see the applications I used on my login screen. Could this have anything to do with the repair? Or is it an unfortunate coincidence and is something else broken maybe? Thanks!