Monitor problem. Blue pixel on black images?

MDXX

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Jan 17, 2011
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First time having a monitor problem. I have the Asus PG278QR. Anyhow, on black screens i get a blue pixel. I downloaded that program called UDPixel and ran through the select colors and the blue pixel only shows on black. Im not sure what this means. Dead or stuck idk. Any advice?

http://imgur.com/a/yubue
 
Solution
Well either it burned out completely, which is sort of preferable, or it is now working again. Basically a grid of wires, sort of, goes to each and every pixel in an array that is addressed by the scalar. The signals from your GPU are addressed to each pixel and determines how much light to let through.

LCDs are basically light shutters. The Liquid Crystal is activated by electricity to 'close' and when current flow is stopped to let the backlight through. This is variable of course so that you can control each color pixel independently. Effectively they are controlling light through polarization by aligning the crystals with a current.

Occasionally they can get stuck, and they are physical gates, so they can be forced to move again...

MDXX

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Yeah i didnt notice it on any other color. It displays the others fine but when black comes up the pixel is blue
 

MDXX

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Hm well i pressed on it, it did a little flicker and now it went away. Any ideas? Something lose inside i take it? Not sure how monitors work haha
 

somesh101

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Jul 16, 2015
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is it a led monitor? led have this problem one led goes down and ruins the display.
if it is led you can try putting sigle colours in that are and note the result. it will explain the situation more.
 

Eximo

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Well either it burned out completely, which is sort of preferable, or it is now working again. Basically a grid of wires, sort of, goes to each and every pixel in an array that is addressed by the scalar. The signals from your GPU are addressed to each pixel and determines how much light to let through.

LCDs are basically light shutters. The Liquid Crystal is activated by electricity to 'close' and when current flow is stopped to let the backlight through. This is variable of course so that you can control each color pixel independently. Effectively they are controlling light through polarization by aligning the crystals with a current.

Occasionally they can get stuck, and they are physical gates, so they can be forced to move again by squishing them.
 
Solution

Eximo

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Ambassador


Almost no one has an LED panel. What are commonly referred to as LED monitors are LED backlight monitors. They are still LCDs. This simply replaced the compact flourescent backlight LCDs for energy efficiency. (We lost a little warmth there, LED backlights tend toward blue)

True LED TVs are available on the market, and many smart phone/tablet screens are also available. The largest LED monitor I think I have seen is around 13", on a laptop, and the smallest true LED TVs start around 46" and go up to 80" or so.

I'm told they don't use them for computer monitors due to high latency on larger screens, and they don't last as long. Latency is fine for televisions, so it is used there for perfect blacks, much like Plasma screens in the past.