Yellow tinge from bottom to top of the screen, 27" iMac

My 27" is showing a yellow tinge when viewing on the bottom of the screen compared to the top?
This makes color corrections on my photos impossible. Anyone else has this problem? You can easily
see it on white or grey background (even in finder windows)

iMac 27" 3.06 GHz Intel Core 2 Duo, Mac OS X (10.6.1)

Posted on Nov 1, 2009 2:29 AM

Reply
2,429 replies

Mar 2, 2010 7:37 PM in response to christianrp

I'm on my THIRD 27" i7 iMac:

First - week 5 machine - noticeable yellow tinge.

Second - week 7 machine - very loud LCD inverter during screen dim.

Third - week 9 machine - prominent yellow tinge - by far the worse of the three. My wife walked into the room as the machine was booting and said "what's wrong with the screen".

For those of you wondering if the problem is fixed, the answer is obviously no.

Mar 2, 2010 8:04 PM in response to pmac5150

Hi to all sorry dont mean to post out of turn but to all you guys who have had mulit screen replacements and are somewhat experts in this yellow peril which we all seem to have with our new imacs i would like to know if this would be acceptable to keep or not knowing that you can end up with even worse yellow uneven marks,there is nothing else wrong so ill just live with it i guess,photo with screen turned up full & other one all the way down.cheers...............http://imgur.com/b3gRn.jpg http:/ /imgur.com/N9OC9.jpg

Mar 3, 2010 12:58 AM in response to Mathias Buergin

After 2 yellow Imacs and 3 yellow screens, I am waiting for the tracking number of my third computer.
I hope this one will be yellow free but I suspect it is just not possible right now...
Most of customers are not aware of the problem. They don't see the color shift and they don't care about forums. Not enough people crying I think.

Message was edited by: You2Mac

Mar 3, 2010 1:05 AM in response to Mathias Buergin

What do you guys think of this?

http://img696.imageshack.us/img696/8484/imgp0607a.jpg

I tried to oversaturate it in Photoshop and this is what I got:

http://img685.imageshack.us/img685/9127/imgp06072.jpg

So, obviously I have the yellow tinge, which I'm able to notice only when comparing in a maximized window the top and the bottom (i.e. when watching movies it seems just perfect).

Considering the fact I don't use the iMac for professional stuff, and that I don't have any more flaw (flickering, noisy HDD, dead pixels...), how bad do you think it is?

Btw, it's week 07.

Cheers.

Mar 3, 2010 3:20 AM in response to Jeremy Riga

Jeremy Riga wrote:


Everyone just needs to know, with 99.8% certainty, if you purchase an iMac it will have a huge, beautiful display. Colors are accurate. Photos are stunning. Video is amazing. If you look at huge gray bars on your screen, you may notice some areas that have lighter or darker grays.


I second that.

But (I'm just thinking ....),
1) there are also variances between units. Some people received *very bad panels.* Don't forget them.
2) it depends on what you are doing with the machine, if like me it's number crunching, Web authoring, family photo and video editing, you probably can live with slight color variances ; on the contrary a professional photo editor will buy an Eizo or LaCie monitor and a MacPro. (Doing video editing on the i7 is a pleasure, it's so fast!).
4) Never compare a 4000$ monitor like the Eizo CG243W and an -all in one computer- 27" or 21" iMac which uses say ... a 500$ panel (maybe a little more).
5) Calibrate your panel with an external tool (I used Spyder 3 Elite) : from bottom to top there is a 400K discrepancy, on my unit. I was told that more than 10% is unacceptable (standard white point is 6500K) . If you can't stand the slightly pinkish bottom, push a little the white point in the profile (toward 6900 Kelvin).
6) As a rule of thumb : "If you can't see a Color Variance or a Yellow Tinge, when in Full Screen mode of your browser, It's A Keeper!"

Cheers.

Mar 3, 2010 4:39 AM in response to KIWI1001

Hi Kiwi1001,

I think your screen looks very good comparing to most cases exposed here. You probably won't notice the slight colour variation when using the computer in most cases if hardly any.

For Scailay, I think your case is more prominent for sure and it could be a problem if you do graphics or any activity that demands an accurate colour selection but that doesn't seem to be your case so it's up to you really.

I could agree that some slight colour variation is acceptable, like Kiwi1001's case. However, it's obvious that there is an issue with these iMacs and I found it unacceptable to sale a pricey machine with that defect. Some people might argue that these panels are cheap and would cost around $500, let's get real, the rest of the components(GPU, HD, DVD, etc) don't cost so much so the panel is not particularly cheap IMHO.

These iMacs pretend to be made for professional use, that's why many people are buying them. Apple has a long and strong history making computers for professionals in the design field and this issue with the panels doesn't match that at all.

Mar 3, 2010 5:46 AM in response to You2Mac

Yea, it's all a matter of your eyes. And everyone has a different set. 🙂 Kiwi's Looks Close but still no Cigar! 🙂 Like I said, there is no Perfect Late 2009 iMac Screen. All the supposedly Perfect iMac Screens will not dare to post pictures here. Because they know, their Screens are NOT perfect. Even the guys early on who got their screens replaced & claimed they were perfect, never posted pictures to share. Probably fearing we might scrutinize their so called perfect screens & find a flaw. But again, if imperfections don't show up in Safari at Full Screen, It's A Keeper, IMHO. Otherwise your driving yourself crazy trying to find the perfect screen, that really does not exist & you might end up with a screen that is worse. There has been no progression in the Yellow saga since November & I don't expect there will be any, for this iMac Late 2009 Model.

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Yellow tinge from bottom to top of the screen, 27" iMac

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