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what causes dead/lit pixels?

post #1 of 14
12/1/03 at 1:00am
Thread Starter 
Hey all!

Just tonight i was greeted with two cyan colored pixels. I noticed it over the new "white" (pale blue) color i have on sagerforums. Now i can't understand why they just appeared over night. I have an idea though. Extensive gaming. It has to be the reason, because my screen has been absolutely perfect over the life of it so far, and just this weekend, i finally was able to do some online COD gaming. Then these pixels show up. Seriously though, they are not bad at all. I can definately live with them.

Here are my observations, based on different background colors on my desktop.
Magenta: dark blue pixels
White: cyan pixels
Black: no visible dead pixels
Yellow: cyan color
red: black pixels

so i guess they kind of depend on the color of the background, but i almost have to conclude that is because i am trying to adjust my eyes to a more vibrant color than the actual lit pixel. I am only interested in knowing why
1) they appear as black on a dark backgrounds
2) they appear as cyan on light backgrounds.

also, i would like to know if anyone thinks it is because of hardcore gaming for many hours, whether it would cause them to stay a color.

Any debate would be greatly appreciated! Thanks!
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post #2 of 14
12/1/03 at 1:29am
Lit cyan pixels are the same as stuck red ones, since blue and green makes cyan.

A defective pixel can be caused by a bad power connection in a row/column of pixels, or a failure of the crystal which prevents light from passing through the red filter. Since TFT screens are white (pixels passing light through) when on, the red pixel would be stuck in an off (not passing light through) state, thus not noticeable with a dark background.
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post #3 of 14
12/1/03 at 1:39am
Thread Starter 
Quote:
Originally Posted by JeffL
Lit cyan pixels are the same as stuck red ones, since blue and green makes cyan.

A defective pixel can be caused by a bad power connection in a row/column of pixels, or a failure of the crystal which prevents light from passing through the red filter. Since TFT screens are white (pixels passing light through) when on, the red pixel would be stuck in an off (not passing light through) state, thus not noticeable with a dark background.
hey, thanks! I have been lead to believe that lit and stuck pixels are the same thing, stuck on a single color. And dead pixels are just black and not really noticeable. Well, these two pixels are really unnoticeable . I can barely notice them unless i am looking pretty close to the screen on a white screen. Obviously with a red background, i can vividly see the two black pixels.

A bad power connection is what you think it could be, huh? That must have been caused by the heat that was produced while gaming this weekend. Then the transistors for those individual pixels got fried or something. oh well, it sucks, and now i can no longer say my screen is absolutely perfect, but i can rest assured no one will ever see them.
<---- guess i shoulda done that a long time ago!
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post #4 of 14
12/1/03 at 1:55am
what about hulk, my brite green pixle that appears about 10 minutes after turning my sager on?
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post #5 of 14
12/1/03 at 2:05am
Thread Starter 
Quote:
Originally Posted by karatekid3d
what about hulk, my brite green pixle that appears about 10 minutes after turning my sager on?
I always told myself that if i got a stuck pixel that was really noticeable i would simply take as fine a point marker i could find and gently put a small black dot over the stuck pixel. That way i wouldn't have to stare at it. In my case, a black mark would be more noticeable than the cyan, but in your case, it may make the problem seem less as big a deal as it is. Im curious as to why they freeze like they do. i mean, sure, everyday wear and tear will do that, but could it be because of extensive heat in the screen during intense gaming. btw does the screen get hot while gaming. Guess i shoulda checkd that out too. Take it easy!
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post #6 of 14
12/1/03 at 2:39am
oh god! I got that badger badger badger badger mushroom mushroom song stuck in my head! I'm going to have trouble sleeping tonight
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post #7 of 14
12/3/03 at 1:50am
Quote:
Originally Posted by robcoo1025
oh god! I got that badger badger badger badger mushroom mushroom song stuck in my head! I'm going to have trouble sleeping tonight
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post #8 of 14
12/3/03 at 8:27pm
Quote:
Originally Posted by karatekid3d
what about hulk, my brite green pixle that appears about 10 minutes after turning my sager on?
Really? I have never heard of that happening before.
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post #9 of 14
12/4/03 at 12:05am
yea he's in the top lefts, noticable in almost every color but white since it washes it out. It's really bad on a black background. Thankfully it's out of the way so i don't see it that much.
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post #10 of 14
12/4/03 at 1:07am
what about rubbing it out? i heard that works, kinda....


-Jcc2k4
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post #11 of 14
12/4/03 at 1:18am
Thread Starter 
Quote:
Originally Posted by jcc2k4
what about rubbing it out? i heard that works, kinda....


-Jcc2k4
i was able to rub out a blue pixel that appeared two weeks after reciveing my laptop. I was thinking about returning it at the time, becuase of the pixel and other things, now i am glad i didn't. The two pixels i just got on my screen are not able to be rubbed out, unfortunately! but i can't see them on either a white screen or a black screen, so i am ok with it. Only time i can see them blatently is on a red screen and they appear as black. strange!
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post #12 of 14
12/4/03 at 1:24am
is there any special method to do it? or is it just small circles?

-Jcc2k4
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post #13 of 14
12/4/03 at 1:27am
the shfting magnetic poles of Vega combined with the balkanization of solar flares reflecting off of dark side of Europa are a strong source of dead pixel amalgam.
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post #14 of 14
12/4/03 at 1:28am
Thread Starter 
Quote:
Originally Posted by jcc2k4
is there any special method to do it? or is it just small circles?

-Jcc2k4
well, the first time i got the lit pixel i simply pushed in on the screen. You know how it makes all those swirly colors right? well 2 minutes later the pixel was gone. There must be some reason it went away that would be defined as a different problem from the current pixels i have now. They are different. If i had an annoying green pixel or red pixel i would simply put a small black dot over it to hide it, (and in a way simulate a dead pixel). cheers!
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