Ahhh.... crap mine definitely has it now I did the actual test. but it doesn't really bother me. I didnt even notice that until I read this thread. So will this problem get worse in time? I have apple care for 2 years may be I should just bring it in just before it expires? Will they fix it or not?
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mid-2011 imacs 27" & 21" yellow tinted screen thread
- Thread starter jgonzo
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yep, your bottom half has the yellow tint, maybe not as bad as some others.
They are telling me since I purchased it in the store that I have to drive back 2 hours to that store to get the unit replaced. The stated that if I purchased it online from apple.com or amazon or any other online store they could do a mail in. This is bull s---. I am crippled because I purchased it in the store and have to spend 6 hours of my time plus gas to get the issue straight. This is ridiculous.
I don't think that's a screen defect, that's probably just due to your viewing angle, my screen is absolutely perfect as far as i can tell, but when i sit 25 inches from the screen (eye-height in the upper 1/4 of the screen) and look down towards the bottom of a white webpage (macrumors), the image color does looks a lot warmer="yellower" on my screen as well. If i bow my head down, or back away enough from the screen, it completely disappears. I think that's just in the nature of the IPS display panel.
I've investigated a few iMac screens up close, and this "feature" was common for all of them.
BTW...if you look at your screen the opposite way....macrumors seems a bit yellow on the top...so don't worry.
That's to an extent true. Although sometimes that yellowing is very clearly different from the tint shift caused by viewing the monitor from a certain angle.
Try to make your camera focus on the apple logo on the front and lift it up before you release the shutter. That usually helps on the distortion (rainbowing) in the image.
on pic #2 however, it looks like you might have some yellowing at the bottom but it could be the quality of the picture.
You mean it comes and goes on some screens? or that the yellowing on some monitors are not due to the angle?
I'm just saying, that those of us that test negative on the screen test, also notice some yellowing...but that it is of a different nature, and not necessarily a defect.
No, I agree with your point! I was just adding that, particularly in previous models, when the led diffusers were incorrectly seated, users (myself included) would often perceive yellow patches all over the screen.
eww! when you say often, would that be all the time IF they were incorrectly seated to begin with, or would the screen sometimes look ok, if the the iMac's temperature was cooler or hotter?
It would suck bigtime if you were to fire up an Imac in the store, to test it before you take it home...only to find out that yellow crap appears after playing 2 hours and exiting to the desktop at maximum temperature.
If the LED diffuser was warped the user would notice it all the time, I never used it long enough to test whether heat made any significant difference as the screen was noticeably poor to start with. It was a 2009 i7. I also briefly owned a 2010 but there were hairs under the glass and dead pixels, suffice to say, I've not had much luck with iMacs.
Do you think the issue you had with yours, just isn't fixed yet, and the unfortunate people here have the exact same problem with theirs...or was it more in "spots" than the more area (usually lover screen) based discoloring many here post images off? ?
Nothing is perfect, especially LCD screens. TV panels has it's own problems, violet black on IPS-L, green tint on Panasonic plasma, pink white colour on other plasma and etc.
From some angles I also can notice yellow tint. Also with time LED backlight will be less bright and produce more warm picture.
Hi everyone and thanks for the answers. This time, I did another test, the one with the timer.
I post the picture. I can see a yellow tint in the last third of the page. Tell me if you can see it.
Can I do something to calibrate the screen, like doing something with the white color? Thanks!
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I post the picture. I can see a yellow tint in the last third of the page. Tell me if you can see it.
Can I do something to calibrate the screen, like doing something with the white color? Thanks!
My Pioneer Kuro plasma is flawless, absolutely flawless. It's bordering on a piece of engineering perfection. Every LCD screen i have owned (9-10 screens by this stage) has had excellent colour uniformity and zero back light bleed and no weird tint. My experience with Apple has not been the same unfortunately. So you see the bar is raised high, and you can go on kidding yourself its all a "feature" of the technology and its simply not mature yet when you have just spent a small fortune.
My Pioneer Kuro plasma is flawless, absolutely flawless. It's bordering on a piece of engineering perfection. Every LCD screen i have owned (9-10 screens by this stage) has had excellent colour uniformity and zero back light bleed and no weird tint. My experience with Apple has not been the same unfortunately. So you see the bar is raised high, and you can go on kidding yourself its all a "feature" of the technology and its simply not mature yet when you have just spent a small fortune.
Kuro yes, best plasma panel. But with time it will be not so good, more pale colors, that's physics low.
As to LCD screens - I don't believe you. TN matrix is a *****, PVA matrix is slow, IPS-alpha I have on my Panny 32 LCD has violet black and corner bleeding. Yes it's almost unnoticeable but this things exists.
You know apple uses the same LG 27 inch matrix that NEC and Dell uses in their $1-2K monitors. The only difference is calibrating and backlight technology. And yet people complain about this panels too.
So if you don't have noticeable LED light defect, your screen should be fine.
PS I know problem with apple screens exists. The best way - choose your own imac by yourself. Go to store, make some tests. I chose mine over 3 models.
Yes, nothing you can do with delivery, it would be a lottery every time.
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My Pioneer Kuro plasma is flawless, absolutely flawless. It's bordering on a piece of engineering perfection. Every LCD screen i have owned (9-10 screens by this stage) has had excellent colour uniformity and zero back light bleed and no weird tint. My experience with Apple has not been the same unfortunately. So you see the bar is raised high, and you can go on kidding yourself its all a "feature" of the technology and its simply not mature yet when you have just spent a small fortune.
I agree that we shouldn't accept anything but a perfect display. But witnessing a more yellow tint at another angle across the screen: down if you look at it from a high perspective, and high, if you look up at the screen. If it's white all across the display when viewing it directly from the front at a distance, the display works as intended, or at least within the boundaries of the design, matured technology or not. The yellow stained displays are certainly faulty and should be replaced.
Go to a store and check their displayed models, they all have what odvan describes as a yellow tint, even though they test negative in your screen tests with pictures taken at perfect angles. I'm not worring about that.
For a time, i had two 27" sitting next to each other. My own, and another one which i after a lot of testing concluded was just as god, and identical with my own from any angle. So i know that two displays can be the same.
This is my new 2011 27" iMac. I am certain there is at least some yellowing throughout the bottom of the screen. Does it look bad to any of you? I can't notice it unless I am looking at something white and trying to find it. It's also quite visible when I first start up the computer, when the Apple logo appears on the white background.
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Yep. Exactly.
Also I'm going to do calibration, it seems the black level is too bright. Looks like imac was designed for usage in a very light and bright room, with big windows, lot of white.
I don't see it, it looks pretty evenly colored from your picture.
If' it clearly visible with a white background try examining it with the white background in the pixel test here: http://imac.squeaked.com/test.php
Difficult to say really, but there's no real way to truly eliminate the yellowing issue until apple either returns to CCFL backlighting, which would be somewhat of a step backwards, or starts using RGB LEDs, which are prohibitively expensive for consumer-grade monitors.
In previous models, there were far more problems with the panels than there appears to be now. I've seen a few of the more recent iMacs and in truth, the yellowing doesn't seem to be as extensive as it was. Maybe down to improved QC, who knows.
To answer your question though, it was both spots and the more severe yellowing in the lower third of the screen. As I said, they haven't fixed it, and they won't be able to completely until it gets a redesign.
So calibrating helped? Good.
With time yes, tint could be worse, because LED lamps with time lose brightness. But that happens with all LCD/plasma/CRT panels.