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Thread: Dead Pixels: THE GREAT LCD TRUTH

  1. #1
    Super Moderator Super Moderator Big Booger's Avatar
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    Dead Pixels: THE GREAT LCD TRUTH

    2) Bad Pixels

    Hi Fred, In a recent issue , you wrote "So, the broad
    generalization is that higher contrast ratios are better, just
    as higher resolutions are generally better. But--- and it's a
    huge 'but'--- don't buy any LCD just on specs. You really need
    to see it with your own eyes to know what will be OK to you
    over hours and hours and hours of viewing."

    There is one thing you should warn your readers about, when
    buying, is the guarantee on how many pixels must be faulty
    before your screen gets replaced.

    I found this warning on Toms Hardware:
    http://as1.emv2.com/I?X=2550c62b8764...93a02c4640a744

    Best regards, Tony Wolfs

    That's right, Tony. Few vendors promise that desktop or laptop LCD
    panels will be perfect: Some pixels on a brand-new LCD screen may be
    permanently off (showing as black spots); or stuck on one color (all
    red, or blue, or green); or stuck at one brightness (brighter or dimmer
    than the surrounding pixels.)

    Many vendors use a simple count to determine whether a screen may be
    returned for replacement. If your screen has fewer than, say, 10 dead
    or
    malfunctioning pixels, they may refuse to replace the unit.

    Mathematically, that may seem OK: After all, on a screen with millions
    of pixels, a few bad ones is only a tiny percentage. But just as
    another
    tiny defect--- a pebble in your shoe--- can ruin a walk in a park, even
    one or two dead pixels in the wrong part of your screen can ruin your
    computing experience.

    And it's not a matter of being oversensitive: A bad pixel may
    masquerade
    as a period, comma, or other punctuation mark, for example, causing
    reading or editing problems; or similarly may affect image editing or
    viewing.

    So, Tony's point is a good one: See what the return/refund policy is on
    any LCD or laptop you buy to ensure that you can at least exchange the
    unit if it has dead or malfunctioning pixels.


    I experienced this firsthand when I bought my 18inch LCD last year.. I almost go screwed on this deal, as I found a dead pixel dead center in the middle of the LCD screen I bought.. not knowing about this finicky LCD policy I took it back, and got this same story fed to me by the customer service rep, not being the one to take blah blah blah's lightly, I asked him to produce a company statement concerning this,

    He brought another maker's policy out, because they didn't have a Mitsubishi maker contract or statement concerning the pixel policy..

    Yours truly left with a new LCD, that I had them allow me test in the store before I took it home. Now my LCD is dead pixel free!!! hehehehe

    and the next LCD I buy, I will definitely test it before I take it home. Lessons learned.

    By the way, this article came from "The Langa List" which we have a link on the main Forum page at the very bottom, you'll see the Langa List banner. Click it, sign up and enjoy this valuable and interesting information.

  2. #2
    Techzonez Governor Super Moderator Conan's Avatar
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    I've got 1 dead pixel. But it is at the lower left hand corner of the screen so I hardly ever notice it.

  3. #3
    all bets are off... TZ Veteran SupaStar's Avatar
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    Re: Dead Pixels: THE GREAT LCD TRUTH

    Originally posted by Big Booger
    Yours truly left with a new LCD, that I had them allow me test in the store before I took it home. Now my LCD is dead pixel free!!! hehehehe

    and the next LCD I buy, I will definitely test it before I take it home. Lessons learned.
    AFAIK a pixel can die even after you have brought it home. I read somewhere that it could be fine for months then BAM!! One dead pixel.

    Some manufacturers have a policy based on the number of dead pixels within a certain radius of another, i.e. there needs to be more than 1 dead pixel within an inch of another before they will replace the entire screen.

  4. #4
    Super Moderator Super Moderator Big Booger's Avatar
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    that is crap. I think it should be 100% defect free.. and IMHO 1 dead pixel out of a million is 1 too many!

    Just ran a test, I am still dead pixel free..

  5. #5
    Titanium Member efc's Avatar
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    Question

    What test?
    Linux Mint Debian Edition

  6. #6
    Super Moderator Super Moderator Big Booger's Avatar
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    sorry if this is an old post, but I just now noticed it.

    What I do is create several wallpapers, one black, one white, one blue, one red, one yellow and one green.

    I then maximize that image so that it covers my whole screen. I then search the screen for dead pixels.

    it takes some time, but it works. I haven't found a dead pixel yet, knock on wood.

    You can also use the site below to test as well:

    http://www.gdargaud.net/Hack/DeadPixels.html
    Last edited by Big Booger; July 19th, 2003 at 01:54 AM.

  7. #7
    Succeded in braking Windo TZ Veteran Dehcbad25's Avatar
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    Dead Pixel Free!!
    Though it had some stains on it. Should I replace the monitor when it has more than 10 stains???

  8. #8
    My Name is.... TZ Veteran Stripe's Avatar
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    YEAH!!! Dead Pixel Free!!! Monitor has been burned in for over a year too so no worries about them suddenly keeling over and dying on me

  9. #9
    British Stud Muffin TZ Veteran GimieGimieGimie's Avatar
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    Talking

    Dead Pixel free here too!

    I have a 15.1' laptop screen and it's spanking brand new, so i wouldn't expect such damage yet...

    Having said that, the last laptop i bought, the one i told the company to take back and give me my current one, had 3 dead pixels on the screen from the start!

    3 Coloured dots, one green (centre of screen), and a few red (around the screen), annoyed the hell out of me, and i got the 10 or less bullshit too.

    I believe the best way of detecting dead pixels that are coloured is by staring at a DOS screen, any black ones you would instantly notice in Windows :P

    Great team DOS and Windows huh?

    If i ever get 3 or more dead pixels on the laptop i have now, into the bath it goes, and out comes the 5 years accidental damage insurance

    Gimie

  10. #10
    all bets are off... TZ Veteran SupaStar's Avatar
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    Originally posted by GimieGimieGimie


    If i ever get 3 or more dead pixels on the laptop i have now, into the bath it goes, and out comes the 5 years accidental damage insurance
    Don't you just hate it when you are sending an e-mail in the bath and your laptop falls in?

    Damn it!

  11. #11
    British Stud Muffin TZ Veteran GimieGimieGimie's Avatar
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    Originally posted by SupaStar
    Don't you just hate it when you are sending an e-mail in the bath and your laptop falls in?

    Damn it!
    Happened to me quite a few times actually

  12. #12
    all bets are off... TZ Veteran SupaStar's Avatar
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    Originally posted by GimieGimieGimie
    Happened to me quite a few times actually
    ROTFLMAO

  13. #13
    Security Intelligence TZ Veteran cash_site's Avatar
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    Hmmm.. i wonder if my desktop will work in the bathroom too?? LOL

    --- 0wN3D by 3gG ---

  14. #14
    Super Moderator Super Moderator Big Booger's Avatar
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    Samsung Electronics announced Thursday that from Jan. 1, customers who discover defective pixels on an LCD monitor produced by the company less than six months after its purchase may have the panel replaced free of charge.

    An LCD monitor is made up of hundreds of thousands of tiny pixels. Manufacturers have classified products with 10 or less defective pixels as "normal" and refused to repair or exchange them, which led to complaints from customers. Samsung added, however, that the free exchanges do not apply to customers who purchased their LCD monitors before Jan. 1.

    Chosun

    Glad to see one maker step up to the bat and playball for the consumer! My next LCD quite probably will be a samsung due to this.

  15. #15
    Techzonez Governor Super Moderator Conan's Avatar
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    Quote Originally Posted by Big Booger
    Samsung Electronics announced Thursday that from Jan. 1, customers who discover defective pixels on an LCD monitor produced by the company less than six months after its purchase may have the panel replaced free of charge.

    An LCD monitor is made up of hundreds of thousands of tiny pixels. Manufacturers have classified products with 10 or less defective pixels as "normal" and refused to repair or exchange them, which led to complaints from customers. Samsung added, however, that the free exchanges do not apply to customers who purchased their LCD monitors before Jan. 1.

    Chosun

    Glad to see one maker step up to the bat and playball for the consumer! My next LCD quite probably will be a samsung due to this.

    I read that this is only valid for "Korea bought" units.

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