Question What is this? Weird 1mm red-pink square on Samsung AMOLED screen

[Toonhaze]

Hi all

My device is Samsung Galaxy Book 12 and it is now out of warranty. Had a bad case of vertical banding on it but Samsung "fixed" it by replacing one display with another and now I have this weird square.

Can someone please tell me what it is, how it came to be and whether it can be fixed without sending it to Samsung?

https://www.dropbox.com/s/1o3vlgh1oa18xcj/AMOLED defect.mp4?dl=0

On green and blue colors it's almost invisible but otherwise it's there. It's not one pixel but a square cluster of pixels. The pixels are not dead (off) or stuck on any particular R/G/B color. This totally mystifies me. Like there is something behind the display itself that illuminates that area.

Thank you

 

[Lutfij]

Have you tried and seen if pushing down on that square removes it? That looks like a faulty panel, more than just one pixel, mind you. The only way you're getting that resolved is getting another panel replacement.

 

[Toonhaze]

I tried pushing it down, but it's AMOLED glass screen and if I push it too hard it might break. The square stays the same.

I wonder how this defect can be formed... and as a perfect tiny square...