I have a Samsung NP550P5C laptop with a problem on the display I've never seen before: it has a 2x2 pixel area that is considerably brighter than the rest of the screen area. Here's a closeup:
The pixels work otherwise fine and are not stuck at white. If I adjust screen brightness, the spot gets brighter too. If the spot is on a dark area it's completely unnoticeable. It's a LED backlit panel - are the LEDs really that small?
What could cause this problem and is there some way to fix it? The laptop is still in warranty but I know they will just give me a new one in exchange and that means more hassle with the software installations and all than I'm ready to go through for such a small, albeit annoying problem.
Edit: I did the suggested test with the Chrome extension, here's what the bright area looks like on other colors.