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27", 21.5" iMac Owners, test your screen for yellow tint issue here

Is your display having the problem described?

  • iMac 21.5" both grey bars look identical in color

    Votes: 102 8.9%

  • iMac 21.5" the bottom bar looks more yellow

    Votes: 199 17.4%

  • iMac 27" both grey bars look identical in color

    Votes: 311 27.2%

  • iMac 27" the bottom bar looks more yellow

    Votes: 533 46.6%
  • Total voters
    1,145
toed said:
I agree.... boosting the saturation to riduculous, even stupid, levels proves nothing...

Do that with any monitor or any LCD TV and I bet you see variation... stupid "trick" if you ask me...
Click to expand...

OK, try doing the same saturation boosting with this pic of my 2006 Macbook Pro 15 inch screen. Nothing you could do to the colors on this image would make it look nearly as bad as those images above.

Original:
2u5qr2o.jpg


Saturation Maxed Out with Preview.app:
4j3jpd.jpg


The worst you get is slight "blue"ing at the bottom right corner, and that could be written off as an effect of the camera.

It is a sad day when an LED backlit IPS display has worse consistency than a CCFL backlit TN film display.
 
here is mine at full brightness, does it have the yellow tint issue?
 

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dirx said:
Can you please take a photo and post it here?
Close the blinds, turn all lights off, adjust the iMac so that he is 100 % vertical and take a picture.

I m starting to doubt that there are iMacs without the yellow tinting...
Click to expand...

If you have to go as far as closing that dang blinds, turning off all the freakin' lights and adjust the bloody angle of the iMac in order for the tint to become apparent then it's a moot point. Creating this setting is not an everyday type of setting and if your eyes can't see it under normal use then what's the point? :p
 
cathy88 said:
here is mine at full brightness, does it have the yellow tint issue?
Click to expand...

The lighter gray bars (Left) both look pretty even. I can see some "warmth" to the right, but compared to the yellow going right up and down my screen, this is one of the better ones I have seen.
However:

When you pop this shot in photoshop and tweak the saturation, and curves (separately) you can clearly see more yellow emerge on the right vertical edge of your screen. It creeps in slightly.


This "test" to boost saturation/levels/curves is not useless by any means.
Digital cameras have sensors that capture light at specific wavelengths to reproduce a specific color.
Upping saturation and messing with curves just helps you see what you couldn't see CLEARLY without editing it. It's harder to see 40px wide of yellowing on a screen with such a high resolution like this one especially when that yellow is surrounded by white, for example. Our eyes need the added contrast to confirm what we thought was there all along.

Edit: avihappy shows how this applies to normal screens in the post atop this page.
 
HLdan said:
If you have to go as far as closing that dang blinds, turning off all the freakin' lights and adjust the bloody angle of the iMac in order for the tint to become apparent then it's a moot point. Creating this setting is not an everyday type of setting and if your eyes can't see it under normal use then what's the point? :p
Click to expand...

The point is, that you have to do this in order to get good results. If you dont adjust the angle, you get even worst results. The more you tilt your display, the worse the yellow tinge gets. And closing blinds and turning of lights is neccesary to make sure that there is no yellow light comming from other sources than your display.
 
It makes sense to boost the colour if your working with photos you will be playing with colours.
Are there any 27 or 21 that are ok if so I would love to see a photo of them to prove it, I starting to think there are none. People just aren't aware.
 
Brilliant service from CMYK outside Edinburgh. Dropped my iMac off yesterday, screen came in and was replaced this morning.

Only problem is, the yellowing is worse than before. Previously, it was down the right hand side and a bit across the bottom of the screen. Now, a much larger portion at the bottom of the screen is yellowed. On the original screen test, the bottom grey bars are noticeably a very different colour from the top ones.

So much for a guaranteed fix.
 
JacquieH said:
It makes sense to boost the colour if your working with photos you will be playing with colours.
Are there any 27 or 21 that are ok if so I would love to see a photo of them to prove it, I starting to think there are none. People just aren't aware.
Click to expand...

I think that aswell. I havent seen a good iMac Display aswell and I m scanning a lot of forums lately. I made a decision on how I m gonna handle the whole situation. I just bought a Dell U2410 for my photo work and I ll put the iMac under my table. I just did another test and split the picture into rows and colums. I then took the corners and middleparts out and put them together. To make a side-by-side compare.
 

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Help me identify

Any yellow tint in mine? Please advice.. Thanks.
 

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HLdan said:
If you have to go as far as closing that dang blinds, turning off all the freakin' lights and adjust the bloody angle of the iMac in order for the tint to become apparent then it's a moot point. Creating this setting is not an everyday type of setting and if your eyes can't see it under normal use then what's the point? :p
Click to expand...

Operating a computer in a dimly lit room is an everyday scenario. Also, the scenario must be set up because the camera will not work as good as your eyes.

You want to make fools of us, don't you?
 
ascender said:
Brilliant service from CMYK outside Edinburgh. Dropped my iMac off yesterday, screen came in and was replaced this morning.

Only problem is, the yellowing is worse than before. Previously, it was down the right hand side and a bit across the bottom of the screen. Now, a much larger portion at the bottom of the screen is yellowed. On the original screen test, the bottom grey bars are noticeably a very different colour from the top ones.

So much for a guaranteed fix.
Click to expand...
The 27" panel is so huge, there is just more surface for potential flaws and variation at its price point. There is a reason some high end LCD monitors go for $2800 by themselves.

This is why I'll probably just keep mine; getting a different sample just means something else could be wrong. I don't really notice anything in daily use and I try to keep luminance around 100, because it more closely matches prints in my office. (some say it's easier to notice problems with lowered brightness)

Apple has quietly relented as of today (2/26) and said they'll address the issue if you bring your iMac in. My only concern has been and continues to be, could the panel get worse over time? With AppleCare I'll just bring it in if it does.
 
eelpout said:
Apple has quietly relented as of today (2/26) and said they'll address the issue if you bring your iMac in. My only concern has been and continues to be, could the panel get worse over time? With AppleCare I'll just bring it in if it does.
Click to expand...

...and if to many screen replacements come in they will eventually exclude "Yellow Tinged Screens" in the new improved AppleCare packages.
 
SuAlfons said:
Operating a computer in a dimly lit room is an everyday scenario. Also, the scenario must be set up because the camera will not work as good as your eyes.

You want to make fools of us, don't you?[/B]
Click to expand...

I'm sure you're capable of that without my help. :p Look man, I understand that in order for the camera to take a decent pic you have to have the lighting set, but that was NOT dimly lit. They poster said to turn off all the lights, close the blinds and tilt the computer perfectly, that's not normal. Do you use your computer in total darkness everyday? If your own eyes can't see the tinge without going through that much trouble, then it's a non issue.
 
HLdan said:


I'm sure you're capable of that without my help. :p Look man, I understand that in order for the camera to take a decent pic you have to have the lighting set, but that was NOT dimly lit. They poster said to turn off all the lights, close the blinds and tilt the computer perfectly, that's not normal. Do you use your computer in total darkness everyday? If your own eyes can't see the tinge without going through that much trouble, then it's a non issue.
Click to expand...


In order to take a good picture, you have to turn off any lightsources. Its not about making the yellowness visible, its about taking a picture of it under optimal conditions for taking a photo!

You can of course leave your lights in the room on, which have a color temperature of 6000-7000°K, you can have the windows open with some 5500°K sunlight and so on. But nobody with a minimum of technical knowledge will believe you that the yellow tint comes from the iMac itself. They will tell you that it is your desklamp or whatever.

Thats why you have to turn everything off.

If you look from a side or a tilted angle, the yellowness gets worse. Thats why you have to adjust the iMac to be perfectly vertical. Else the people will tell you that colorshifts are normal, due the viewing angle etc...

Again,
its not about making the fault visible or anything. Its about making a good photo which OTHER people can judge under controlled and repeatable conditions.

I had 4 iMacs so far, and the fifth is on its way now and I saw the yellow tinge on all of them. The last one (W8008) was the worst of all 4.
 
dirx said:
In order to take a good picture, you have to turn off any lightsources. Its not about making the yellowness visible, its about taking a picture of it under optimal conditions for taking a photo!

You can of course leave your lights in the room on, which have a color temperature of 6000-7000°K, you can have the windows open with some 5500°K sunlight and so on. But nobody with a minimum of technical knowledge will believe you that the yellow tint comes from the iMac itself. They will tell you that it is your desklamp or whatever.

Thats why you have to turn everything off.

If you look from a side or a tilted angle, the yellowness gets worse. Thats why you have to adjust the iMac to be perfectly vertical. Else the people will tell you that colorshifts are normal, due the viewing angle etc...

Again,
its not about making the fault visible or anything. Its about making a good photo which OTHER people can judge under controlled and repeatable conditions.

I had 4 iMacs so far, and the fifth is on its way now and I saw the yellow tinge on all of them. The last one (W8008) was the worst of all 4.
Click to expand...

Okay, thanks for explaining that. I understand better now. :). Sorry, I just thought people were being OCD about this. I certainly don't deny that the iMac has yellowing issues.
 
MacOSXCheetah said:
check this out.

Apple's Official Statement
"We've addressed the issues that caused display flickering and yellow tint. Customers concerned that their iMac is affected should contact AppleCare."
Click to expand...

That's pretty much what the senior guy at Applecare told me yesterday, that they have a fix. That fix is a replacement LCD panel.
 
Week 46 iMac i5

Here are pictures of my first iMac i5 week 46 (the week full of yellowing) bought from the Apple store in London (Regent Street). I am satisfied as is and will probably ask for a replacement much later if I feel I can do considerably better.

I have been lurking on macrumours for a while reading people's issues and I wanted to return the favor by showing what I have. What do you think of this?

The picture was taken by a Nokia N95. I am also bad at photography and do not know how to adjust the camera.
 

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