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Greyish Smudge marks behind the glass screen.

I have a 21.5 iMac bought in November 2009.

There appears to be numerous greyish smudge marks behind the glass screen on the top left hand corner.

It was not apparent to me at first, but after I started using OMMWriter it became easily visible. I also tried placing a neutral white background like TextEdit and it was easily visible even then.

I have cleaned the screen on numerous occasions and it has not had any effect.

What should I do?

These spots are quite disturbing.

iMac 21.5, November 2009, Mac OS X (10.6.2)

Posted on Jan 15, 2010 10:55 AM

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Posted on Jan 15, 2010 2:06 PM

Hello swapnonil

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Dennis
1,291 replies

Feb 26, 2012 4:05 PM in response to ColonelPanik

The news of the fix came from the “genious” I talked to at the Apple store. He said all replacement screens now have a heat shield between the video card and the LCD that will stop future smudging. Obviously this isn't something coming directly from an Apple engineer but rather from someone who is experienced in diagnosing products.


I know people in the past on this forum have had multiple issues after multiple repairs so maybe this heat shield is a new addition. I'm not holding my breath or putting money on this being an end all solution but I thought I'd pass that information on.


As I mentioned before, make sure and buy Apple care for any iMac or Macbook. I've always bought Apple care and it's saved my wallet more than once. Putting so many components in such a tight space is clearly not always the best way to avoid heat related failure especially if you edit video editing or work with heavy graphics applications such as I do.

Feb 26, 2012 4:07 PM in response to skeltonmedia

skeltonmedia wrote:


The news of the fix came from the “genious” I talked to at the Apple store. He said all replacement screens now have a heat shield between the video card and the LCD that will stop future smudging. Obviously this isn't something coming directly from an Apple engineer but rather from someone who is experienced in diagnosing products.


I know people in the past on this forum have had multiple issues after multiple repairs so maybe this heat shield is a new addition. I'm not holding my breath or putting money on this being an end all solution but I thought I'd pass that information on.

Please keep us updated to see if this new "shield" holds. Good to know. Thanks.

Feb 27, 2012 7:00 AM in response to skeltonmedia

skeltonmedia wrote:


The news of the fix came from the “genious” I talked to at the Apple store. He said all replacement screens now have a heat shield between the video card and the LCD that will stop future smudging. Obviously this isn't something coming directly from an Apple engineer but rather from someone who is experienced in diagnosing products.


I know people in the past on this forum have had multiple issues after multiple repairs so maybe this heat shield is a new addition. I'm not holding my breath or putting money on this being an end all solution but I thought I'd pass that information on.


As I mentioned before, make sure and buy Apple care for any iMac or Macbook. I've always bought Apple care and it's saved my wallet more than once. Putting so many components in such a tight space is clearly not always the best way to avoid heat related failure especially if you edit video editing or work with heavy graphics applications such as I do.

This is a fantastic development.


As noted before, I was going to build a PC so I can "retire" my iMac to light duty after getting the screen replaced for the last time. Now I don't think I'll wait. I'll make sure to talk to a genius who knows about this new heat shield before bringing it in again.

Feb 27, 2012 10:29 AM in response to bhull302

I posted much, much earlier in this thread. I mentioned that my 2009 iMac's screen was replaced twice and then Apple replaced the entire system with a 2011 model.


Well, three weeks ago the problem reappeared. I have smears on 1/3rd of my screens. Unless this heat shield was implemented after August of 2011 it did nothing.


I'm about to submit my fourth repair claim to Apple regarding this issue. I'm waiting until I finish a critical project because every time I give them my iMac it takes about 1 week to get it back.

I can't begin to explain how angry this situation has made me. I switched from PC to Mac because of Steve Job's rhetoric regarding insanely great products. The iMac is not an insanely great product. And Apple doesn't care about us as customers.

Feb 27, 2012 10:37 AM in response to Humble Pie

One more note. If we really want to get Apple to take this problem seriously then we need to complain to the underwriter of their protection plan!


The #1 reason Apple doesn't take this seriously is because it costs them nothing to repair our systems. If you don't have Applecare you pay for the repair. If you have Applecare an insurance company pays for the repair. At no time does Apple experience financial loss. In fact, they make a profit off each repair because they charge a fee to the insurance company for the repair!


However, the underwriter can choose to nullify Apple's insurance policy and charge them for all previous iMac repairs if they suspect it was a systemic problem or design defect. Imagine the insurance provider suddenly calling Tim Cook and saying "You know the 100,000 iMac's with LCD problems that we've repaired in the last few years at about 500 bucks a pop? Well, turns out it was your fault. We need you to pay us 5 million dollars please."


Tim Cook would get this problem permanently fixed in a week if he was facing a massive bill from his insurance underwriter.

Feb 27, 2012 3:29 PM in response to J.K. ROFLing

@J.K. ROFLing

My problem developed before the warranty expired but I was told I was not covered for this issue and I'd have to pay for a repair. This was confirmed by the reseller I was put in touch with.

Different people have had different experiences, but this was mine.


I think the point of a lot of the discussion here is that we don't seem to have a coherent answer about what Apple's policy is. It appears to vary.


This still strikes me as odd because, in this country, products are supposed to be 'fit for purpose' when they are sold or you are entitled to a replacement or refund. What happened to that?.....

Anyway....

Feb 29, 2012 12:29 AM in response to swapnonil

Just now I have 2 iMac 21.5" in technical center for change the lcd panel.

Also my brothers has the iMac 21.5" in the same technical center for the same problem.

I bought these computer at the middle of 2010 and both have the problem on lcd panel (haloe, greyish smudge and pixel dead).

Impossible to edit the photos with these problems, very annoying.

The technical center inform me that the problem probably not be definitively solved and the first panel arrived for repair has again a pixel problem.

Fantastic, I spent a lot of money and this is the result.

Mar 1, 2012 10:17 AM in response to swapnonil

Just noticed that I have this problem too. Except mine is a massive horizontal gray swath in the middle of the screen. It covers about one third of the screen. Definitely not dust - the area has defined, rounded edges. Bought this 27 inch iMac in July, 2009. The screen is yellowed too - evident when using a light gray or white desktop background. Will be seeking replacement asap!

Greyish Smudge marks behind the glass screen.

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