1 2 3 Previous Next 110 Replies Latest reply: Jun 3, 2010 1:30 PM by mexi32
Jeremy Summers Level 1 Level 1 (10 points)
Hi everyone, I have had this weird screen issue pop up in the last few weeks, It's not the gradient or streaking issue, it looks like a burn in effect as I can see text, icons etc in the background at all times on my iMac, even during boot when the white apple screen is showing.

I have the Aluminum 24 inch iMac 2.4 Ghz.

I am going to post some pictures tomorrow to show this issue, anyone else experiencing this?

iMac Aluminum 24 inch, Mac OS X (10.5.2), 2.4 Ghz, 4 GB Ram, 500 GB
  • 1. Re: iMac 24 Aluminum screen burn-in?
    jalapi Level 1 Level 1 (0 points)
    I have the same machine, had it about 6 months. I have just started seeing the same hallows of sort with text and graphics. They show up as a very faint grey outline. They seem to go away after a half day or so, so far, but I'm also noticing that the screen seems to be getting some very slight banding or gradient areas, that also appear to be screen burn.

    I have another machine, that is about a year and half old, white 2Ghz iMac, that stays on just as much as the 2.4Ghz. It has no screen burn signs at all. Not sure what the issue is, but it seems to be apparent.
  • 2. Re: iMac 24 Aluminum screen burn-in?
    BugSquash Level 2 Level 2 (285 points)
    I've just started noticing this too. I can see my icons, the dock, and sometimes text. I've also noticed the gradient getting slightly worse in the last few days.
  • 3. Re: iMac 24 Aluminum screen burn-in?
    Nothlit Level 1 Level 1 (0 points)
    I just started noticing the same problem about a month ago as well. If I move icons around on the desktop, I can still see the ghostly writing and faint icon outlines where they used to be. Same goes for windows that have been in the same place for a while (more than a day). What's more, I don't leave the screen on all the time and yet it still happens. The screen saver activates after 10 minutes, and the screen turns off after 20 minutes. The screen is off for at least 10-12 hours a day (when I'm asleep and gone to class). The fact that it is ghosting with what seems like average use, especially being such a new machine (purchased late Aug. 2007) really bothers me.
  • 4. Re: iMac 24 Aluminum screen burn-in?
    Ralph Hubble1 Level 1 Level 1 (25 points)
    I hope Apple has a plan to resolve this issue. I also see icon list burnt into screen. Also i think it might be some sort of a heat sink behind the glass for the gradient. I have 2 imac's 24" and they are both doing the same thing
  • 5. Re: iMac 24 Aluminum screen burn-in?
    pEst_31 Level 1 Level 1 (0 points)
    This is very worrying to me. I've only had my iMac for a month and have still not decided what to do regarding the gradient issue, if this is likely to happen as well I'm definitely getting rid of this lemon asap... Anyone getting this burn-in on the 20" iMac?

    Just for comparison's sake, I've had a Sony 17" screen (which is probably also a cheap TN because it has a gradient too, though less evident than the iMac's) for 7 years with screen-saver off all the time and have no burn-in at all, so there's no excuse for that, especially because supposedly the 24" iMacs have a better quality screen than TN...
  • 6. Re: iMac 24 Aluminum screen burn-in?
    J D McIninch Level 5 Level 5 (4,060 points)
    You cannot get screen burn-in on an LCD display the same way you can on a Plasma or CRT display. On LCDs, it's possible that the liquid crystals sort of "set up" in a pattern when they are exposed to a constant charge to orient them a particular way (e.g. to change them to a particular value). Basically, the molecules stack together like pick-up sticks.

    You can jostle the crystals loose by cycling them through different colors, especially between black and white, for a short period of time. If you simply run a screen-saver that will involve the pixels in the display being cycled through some colors, you will fix it.

    The problem is worse in cold environments. Also, it shouldn't occur very easily as it takes a while. The effect should not be permanent. If you start to see systemic effects (patterns not representing actual items on the display, such as banding patterns, etc.), that's a different problem and probably relates to voltage regulation to the display (it's probably not the case with you, but LCD displays that aren't sealed well enough can do that when they get into a humid environment).
  • 7. Re: iMac 24 Aluminum screen burn-in?
    Nothlit Level 1 Level 1 (0 points)
    I understand what you are saying about LCDs not burning in the same way CRTs or plasmas do. But I think it's still fair to call this "burn-in" because it essentially looks the same, regardless of whether it fades over time. Whatever is happening here is a very real problem that is apparently not as rare as you claim (at least in my case).

    My screen starts exhibiting this "burn-in" or whatever else you want to call it after only 1 or 2 days. If I delete an icon from my desktop that has only been there for 1 or 2 days, it leaves a ghostly remnant of itself that takes another 1 or 2 days to completely fade away. Same goes for windows that have been open in the same place for a while (like my web browser). If I minimize/close them after a couple of days, I can see ghostly traces of where the edges of the window used to be.

    I do, in fact, use a screen saver that uses shifting colors, but it doesn't seem to help at all, at least not on the scale of "a few minutes." The only thing that seems to help is completely turning off (or sleeping) the machine for 8 or more consecutive hours. The burn-in still remains even after that, but it's much fainter. I would imagine if I left it off for an entire day, it might go away. But that's a terrible solution to this problem. I want to be able to use my iMac, not leave it turned off all the time to avoid screen burn (or molecular alignment, or whatever it is)
  • 8. Re: iMac 24 Aluminum screen burn-in?
    pEst_31 Level 1 Level 1 (0 points)
    You can get burn-in (or call it 'image persistence') on an LCD screen. I know this because I've just bought a Philips LCD TV and it's mentioned in the manual. Common burn-ins on LCD TVs are the TV logos on the corners and news ticker bars on the bottom.

    HERE'S AN APPLE DOC ABOUT THIS THAT MIGHT SOLVE THE PROBLEM:
    http://docs.info.apple.com/article.html?artnum=88343

    Please let me know how it works out for you guys!!!!
  • 9. Re: iMac 24 Aluminum screen burn-in?
    J D McIninch Level 5 Level 5 (4,060 points)
    I didn't mean to imply that it doesn't exist. Burn-in on LCDs is different though, as it's pretty much reversible. Burn in on CRTs and plasma displays results from a physical ablation of material from the inner surfaces of the display. On an LCD, it's a result of the oriented molecules in the display interlocking. As the article you cite states, you can prevent it by preventing the screen from having the same static image on the display for too long or by turning off the display. However, if the display itself is not otherwise damaged, you can generally reverse the process by displaying dynamic (constantly changing) images on the display for some time (i.e., a screensaver). The optimal dynamic image would be something that rapidly switches the affected pixels between black and white.
  • 10. Re: iMac 24 Aluminum screen burn-in?
    Nothlit Level 1 Level 1 (0 points)
    I know you weren't implying that it doesn't exist, and I didn't meant to sound confrontational. And, yes, I am glad there are techniques for reversing it. The problem is that it's not a rare occurrence in my case (and apparently the others who have posted in this thread). It happens on a daily basis. To have to go through these "fixes" every day just to prevent image persistence seems like too much to ask of the user. I would argue that normal use of a computer, with a screen saver that activates after an idle period of 10 minutes, and the power saving mode turning off the screen after 20 minutes, should not result in image persistence. Yet it does.
  • 11. Re: iMac 24 Aluminum screen burn-in?
    James Brizendine Level 1 Level 1 (120 points)
    I also have this same problem. The difference is that my "burn-in" will not go away after (any) length of time. I,m trying the fix in Apple article #88343. Anybodyy else have the problem but just doesn't go away?
  • 12. Re: iMac 24 Aluminum screen burn-in?
    3on Level 1 Level 1 (0 points)
    I'm having the same problem on my iMac Alu 24 inch.
    It started yesterday while using borland under Vista, when I went back to Mac OS I dicovered ligne on the place chere is the left marge of borland.
    And again toay ne igne appear after using borland in VMware...
    I could blame Borland but green + black colors should not be to hard for a LCD which costest around 3K (with the harware of course).

    I'll call the apple care to se what they can do even if I can't give my iMac to them until the end of the school year.

    Here are some pictures of the burn-line (not easy to see I agreee but they really exists and appeared in juste 2 to 3 hours).
    http://fry-them-all.com/temp/iMac/DSC_0005mini.jpg
    http://fry-them-all.com/temp/iMac/DSC_0011mini.jpg
    http://fry-them-all.com/temp/iMac/DSC_0005.jpg
    http://fry-them-all.com/temp/iMac/DSC_0011.jpg
  • 13. Re: iMac 24 Aluminum screen burn-in?
    Charles Whalley Level 1 Level 1 (70 points)
    We aren't the same group of people who were subjected to the 'problematical' video card when the Aluminium iMac was originally launched. Apple eventually offered us a software/firmware fix for the card?

    Mine just started looking pretty bad!
  • 14. Re: iMac 24 Aluminum screen burn-in?
    Defcom(UK) Level 6 Level 6 (15,320 points)
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