Comment by Jordan-117
4 days ago
Bit of a tangent but maybe this a good place to ask: I've been trying to diagnose a weird display issue on my 4K IPS monitor. It seems to have a stuck pixel, which looks bright green on a dark background. But weirdly, the pixel changes color if you move your head from left to right, cycling from bright green to hot pink to purple and then back to green (though it doesn't change color when moving your head up and down). Also, it seems to "float" slightly above the actual pixels. For ex, if I open a paint program and draw a straight vertical line directly adjacent to it, there's a gap when looked at from the right, but it seems to overlap the line when seen from the left.
Anybody experience an issue like this before, or know if it has a fix? I've searched but only find discussion of regular stuck/dead pixels.
> Anybody experience an issue like this before...
I have, but only when I've gotten something on the monitor (like liquid droplets or thin hairs placed just right) that did funny things. Have you carefully cleaned your screen recently?
If it's not crud on the screen, then my vaguely-educated layman's guess based on the symptoms is that some part of the light guide layer between the tiny shutters and external surface of the screen [0] has gotten damaged somehow.
[0] Would this be called a polarizer? I'm not sure.
Considered that, but I've wiped, scratched, and put light pressure on the spot with no visible change. Not sure how it could have been damaged in one pixel-sized spot without affecting the surface or any surrounding pixels.
I think you have an actual tiny physical chink in the plastic or glass on the surface of the panel. Especially if you run your finger across it and can feel it.
It feels perfectly smooth -- like the flaw is somehow between the surface and the pixel layer.
That's exactly where the flaw likely is, on the side of the top surface layer which faces away from you. Air bubble in the plastic, or dust inclusion. If you really want to get to the bottom of it, put a 30x pocket microscope over the spot, you'll see the problem clearly. The bad news: It's neither fixable, nor covered by "dead pixel" / "stuck pixel" warranty policies.
(Source: First hand experience.)