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Dead or stuck pixel?

Last response: in Computer Peripherals
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December 25, 2012 6:28:59 AM

I recently purchased a new LCD monitor (a cheap TN panel one from ASUS), and it looks pretty nice. However, I recently noticed what is either a dead pixel or a stuck pixel, and I can't tell which.
It looks bright red against a white background, black against a green background, and is completely invisible against red, black or blue backgrounds.

Also, this screen (as well as most others, excluding a family members' iPhone screen) looks like it's dirty when I look at a white background. It's not very noticeable, but it looks like there's a film of watery/oily grime covering the screen, even right after thoroughly cleaning/first getting.
If you're reading this, thank you for your time and help, it is very appreciated.

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December 25, 2012 9:49:12 PM

Dustin64 said:
I recently purchased a new LCD monitor (a cheap TN panel one from ASUS), and it looks pretty nice. However, I recently noticed what is either a dead pixel or a stuck pixel, and I can't tell which.
It looks bright red against a white background, black against a green background, and is completely invisible against red, black or blue backgrounds.

Also, this screen (as well as most others, excluding a family members' iPhone screen) looks like it's dirty when I look at a white background. It's not very noticeable, but it looks like there's a film of watery/oily grime covering the screen, even right after thoroughly cleaning/first getting.
If you're reading this, thank you for your time and help, it is very appreciated.


Giving the actual model number might help, especially regarding whether it has an anti-glare finish on the screen. It is typical of a an ag finish to make the screen look dirty or sparkly when it is displaying whites. My guess would go toward the ag finish for the dirty screen.

Dead pixels don't produce light or they only produce a white light (in a tn, it would be a white light), stuck pixels will show some light but it could be demonstrated as incorrectly displaying the proper light level or just stuck as red, blue or green. It seems like yours is the former. There are supposedly methods to fixing this, using software or other means. Hopefully someone who is more of a pro at this can answer you.
December 25, 2012 11:06:14 PM

You're right, it (and all of the monitors I notice it on) do have anti-glare finishes. Thanks for that bit of info, I've been trying the rapid-refresh method, and I'm hesitant to use any physical methods out of fear of damaging my new monitor. If anyone else can confirm that mine is most likely stuck instead of dead, that would be very helpful.
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December 25, 2012 11:24:23 PM
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You have a dead sub-pixel. Each pixel is made of of 3 sub-pixel (Red, Green & Blue). When all are fully on you get a white pixel when all are off you get a black pixel.

Since you are getting black on a green background that means the green sub-pixel is dead. Nothing much you can do. A LCD screen actually has millions of little tiny parts so it's not surprising if you get a dead or stuck sub-pixel.

Assuming you have a 1920x1080 resolution monitor, that monitor has a total of 2.07 million pixels. That means 6.21 million sub-pixels. And that excludes a whole lot of other things big and small.
December 26, 2012 12:10:44 AM

That's actually what I was thinking, but nowhere I read mentioned the possibility of dead sub-pixels. Thanks for the help, I don't think it's that much worth bothering over.
December 26, 2012 9:42:44 PM

Best answer selected by Dustin64.
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