Deap Pixels - how many are acceptable?

[wjgollatz]

I just recieved a laptop - and discovered there is a dead pixel - it wasn't too noticeable - but now that I see it....

What is the typical acceptable amount of dead pixels on lcd screens?

 

[ShizNet]

return policy on most is 8, but some limit to 3 on 1 sq, in.
as well i read on anandTech - they try to use eraser to rub on 'dead', it's not going to get more dead than it is

 

[wjgollatz]

Its not so much of a dead pixel - but rather a bright green pixel.

Are there any applications that I can run in the background - to make that bright green pixel - black or something - other than bright green?

 

[Lonyo]

It's a stuck pixel, that means it's stuck on a particular colour.
Dunno, but the eraser thing may work.

 

[wjgollatz]

OK - just what is the eraser thing? I thought he was talking - metaphorically. What is the name of the program?

 

[Big Lar]

It's not a program, it is literal, they take a pencil with a New eraser, or just a new eraser, and gently rub the area to try to activate the pixel, no kidding.

 

[Insomniak]

As far as I'm concerned, zero is the only acceptable number of malfunctioning pixels, which is why I haven't shelled out for an LCD yet...

I say they're knowingly selling defective products.

 

[Demo24]

Originally posted by: Insomniak
As far as I'm concerned, zero is the only acceptable number of malfunctioning pixels, which is why I haven't shelled out for an LCD yet...

I say they're knowingly selling defective products.

its mostly solved. my 2001fp is perfect. Not a single dead pixel anywhere or stuck.

 

[sunase]

>any applications that I can run in the background - to make that bright green
>pixel - black or something - other than bright green?

Whoa, that's a neat thought. It makes sense, the red and blue subpixels might be perfectly functional and could be set to a value that makes the stuck green one less obtrusive.

I don't know of any program for this, but it seems you could test the other subpixels by displaying a screen full of red and then one of blue and seeing if either alters the color. No point in looking if the entire pixel is stuck. ^^

 

[WobbleWobble]

Dead/stuck pixels are perfectly normal in my opinion. Yes, they're a pain in the ass and everyone wants a flawless LCD but it's not going to happen right now.

I don't like the eraser idea as you risk smudging and permanently damaging the coatings on the screen itself.

 

[gururu]

Originally posted by: Insomniak
As far as I'm concerned, zero is the only acceptable number of malfunctioning pixels, which is why I haven't shelled out for an LCD yet...

I say they're knowingly selling defective products.

 

[w00t]

Originally posted by: gururu

Originally posted by: Insomniak
As far as I'm concerned, zero is the only acceptable number of malfunctioning pixels, which is why I haven't shelled out for an LCD yet...

I say they're knowingly selling defective products.

plus bad responce times, and refresh rates.

 

[Demo24]

refresh rates dont really matter

 

[Sniper82]

Whats the chances of a pixel going bad and the LCD perfect out of the box with no dead pixels? Is it common for the to just go bad?

 

[RealityTime]

diamondpros spank lcds and are cheaper lcds are better for less power, less space, less heat and thats about it... oh and word processing, have fun diamond pros rock.

 

[saltedeggman]

Originally posted by: Insomniak
As far as I'm concerned, zero is the only acceptable number of malfunctioning pixels, which is why I haven't shelled out for an LCD yet...

I say they're knowingly selling defective products.

if you are going to buy a LCD ONLY if there is a 0% defective rate, then you be stuck with CRT for a long time

 

[dnuggett]

Originally posted by: saltedeggman

Originally posted by: Insomniak
As far as I'm concerned, zero is the only acceptable number of malfunctioning pixels, which is why I haven't shelled out for an LCD yet...

I say they're knowingly selling defective products.

if you are going to buy a LCD ONLY if there is a 0% defective rate, then you be stuck with CRT for a long time

I'm afraid I may be in the same boat..... eh.

 

[BadAcid]

I'm waiting for OLED , sticking with CRTs in the mean time.

 

[WobbleWobble]

They started introducing short-tube CRT TVs, I wonder if they'll use that technology on computer monitors?

 

[AWhackWhiteBoy]

bah, i'm a firm believer in if you buy a quality product then you'll have just that, and no dead pixels to speak of. I own three NEC LCDs, and two laptops, none of which came with a dead pixel nor after many years of use, have a deal pixel yet.

i've also ordered 4 NEC LCDs for family members, all of which still have no dead pixels.

 

[sunase]

>if you are going to buy a LCD ONLY if there is a 0% defective rate, then you
>be stuck with CRT for a long time

I could easily see Apple or Alienware or one of the other sellers who don't bother to be price competitive offering 0 dead pixels. The actual manufacturers already have dead pixel tests, they just don't consider a small number of them enough to count the screen as defective.

Personally I think passing these through is good for most buyers since it makes the displays cheaper. When it comes to expensive displays CRTs still have better black level and image quality than LCDs, so keeping the price down is important for the LCD manufacturers.

 

[Zepper]

Quite a few CRT monitors already have shallower tubes than in the past.
.bh.

 

[Jeff7]

So what happens if a CPU has a single bad transistor? Or a stick of DRAM has one bad capacitor? They'd probably show up as errors at the factory, and the component wouldn't make it to the market - is that correct?

 

[sunase]

Not correct. For a long time Celerons were just PIIIs that happened to have bad cache and so had half the cache disabled and were sold as a lesser CPU. They probably still do something similar, the Pentium M Celeron's don't have activated throttling for example so ones that fail tests there can still be used. Then there's the whole speed binning business, CPUs that can't run full speed but close enough get marked down and sold. You didn't mention hard drives, but they are even closer to LCDs in this. They have built in reserve sectors for replacing bad ones because it's impossible to avoid some amount of bad ones and still have decent yield. So no, what the LCD manufactures are doing is not novel.