Yellow spots on the screen of Nokia Lumia 920

I started to notice this big yellow spot on my Lumia 920 screen.
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It's a bit hard to detect it on the photos. Tweaking the brightness and contrast helps a little.

It's been more than one year I have it, no more covered by warranty. Replacing a display is too expensive, I think I will have to live with that until my next phone.
Those of you who are also having this issue, do you use QI wireless charging a lot? Because I do. Maybe the electromagnetic field could be interfering with something on the display circuitry and causing it? I know it is not like a magnet next to a tube tv, but still, I don't know, just guessing.

Rafael

Same exact thing is happening with mine now. It's getting worse. First i noticed on the top, then the sides, now the spot right in the middle of the screen.
 
I have the same problem too, i call Microsoft but all of the solution is not solve my scrren problem, i think it a failed or Defective products of lumia 920, and Microsoft Trying to escape the responsibility of the consumer. That's i think.
 
im having the same issue there's a yellow line at the top of my screen then it move to the side and last night the phone got so hot it would wale your skin, i then turn it off and turn it back on i notice a yellow circle it the center of the screen.
I also have a problem where the processor gets so hot the screen itself gets hot too....its a great phone but the battery is bugging, may be its a sale tactic
Nokia uses..:unhappy...smh sad :unhappy::straight: