Is this a common problem for LED iMacs and Cinema Displays?

Discussion in 'iMac' started by acedesign, Oct 19, 2010.

  1. acedesign macrumors newbie

    Apr 29, 2008
    In the bottom left of my screen it looks like a burned image... but I have my display go to sleep after 15 minutes. I can't think of what it is. I NEVER touch the screen, I never have magnets anywhere near my computers, and i don't have a dusty office. Has anyone else had this problem with the new Cinema Displays (what I have) or iMacs?

    Attached Files:

  2. TMRaven macrumors 68020


    Nov 5, 2009
    Did it appear over time, or was it there from the very moment you started the computer? Looks like some sort of smudging under the glass panel, or a burn (the cpu heatsink is around there)

    Either way it's not normal, and I'd have it replaced.
  3. mjsmke macrumors 6502a

    Mar 2, 2010
    In the last 18 months Ive never seen a Monitor supplied by Apple (iMacs included) That doesn't have some sort of tinting or inconsistent colours.
  4. max777 macrumors member

    Aug 3, 2010
  5. MacHamster68 macrumors 68040


    Sep 17, 2009
    ah thats not to bad actually , seen worse on the iMac number 4 of a mate he had 6 or so , lost counting , but the one he has now is nearly without problem after we have taken a dremel and widened the slot of the optical drive a bit and polished it ,so now the dvd's come out in same condition as we put them in :)
    a necessary step ,as apple refused to exchange it after he had so many with different problems , , but now he's happy , but has promised himself never ever to buy a iMac again after they are just released
  6. TMRaven macrumors 68020


    Nov 5, 2009
    Ah that's a cinema display. So no components burning through there. Has to be a smudging/contamination of some kind. Either way get it replaced.
  7. chrono1081 macrumors 604


    Jan 26, 2008
    Isla Nublar
    It's dust, my parents machine is like that although they never noticed it. the reason i know its dust is because I worked as a contractor doing IT work in Iraq for three years and a lot of lCDs had this same problem. Sometimes it looks like blobs, other times the pattern is fine and hairlike. You have to take it apart and clean it and then put it back together and it will be fine. Unfortunaltely im wont sure how you take an Apple display apart.
  8. APtalent macrumors regular

    Jun 5, 2010
    Thanks for sharing man.

    If you want to do it yourself rather than take it to an Apple store, try this:
  9. Leotno macrumors newbie

    Sep 30, 2010
    Hey! I was about to post a new thread about this very exact problem. I bought my 27" i7 iMac a month ago and just saw this today. I thought it was a giant smudge so I tried to wipe it. Nothing. Even did a reset and nothing.

    Heres photos I took tonight.




    I have it on both top corners of the screen. Is this something that I can fix or do I have to haul this thing to the apple store?
  10. max777 macrumors member

    Aug 3, 2010
    take it back!! When i did with this exact problem the 'geniuses' where very shocked/surprised to see it…. I demanded a brand new one and thats what i got.

    I think that most people would put up with it, or not even notice. But Apple need to know this is a real problem.

    Predict that more of these burn/smudge marks will start showing up on peoples new mid 2010 iMacs… could turn out worse than the yellowing incident!!???
  11. Lansylator macrumors newbie

    Sep 11, 2007
    Las Vegas
    Me too!

    I have the same issue on my 21.5" iMac. In the upper left hand corner, going about halfway down the screen and 3 to 4 inches toward the center. Purchased it Jan. 2010, so the one year warranty just passed and no Apple Care. Apparently, according the the Apple support forums, Apple is trying to blame it on 'environmental issues'.

    I guess I am probably out of luck, hopefully it won't get worse. Why can't companies just stand behind the products they produce?
  12. gdeputy macrumors 6502a


    Jul 23, 2008
    New York
    Its dust, if u take a suction cup the imac glass front comes right off, wipe it clean, set it back on and viola! or get a return, but its really a very simple fix.
  13. jagwap macrumors newbie

    Jul 30, 2009
    I just did that fix. Yes it is really easy to get the polycarponate cover off with suction cups and clean off the dust. However it's not dust in my case. Mine looks like the picture and it's going to have to go back.
  14. MacHamster68, Feb 9, 2011
    Last edited: Feb 9, 2011

    MacHamster68 macrumors 68040


    Sep 17, 2009
    its usually just dust that can be wiped away with a damp cloth ..and should be wiped of ,as i guess after time the dust could sort of burn in , that does not mean the display gets to hot its just every small led is emitting heat , if you leave dust anywhere on any warm surface it might dry in ,then it could become something like a watermark of some sort , and then it might need a bit of work to get the dust off again as you cant just place the lcd panel in a dishwasher
  15. janoskim macrumors newbie


    Dec 26, 2016
    My 2013 Apple computer same way burned! This really bad! Any cheap PC is not like this! Very disappointed! This iMac was my last Apple product!

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