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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
I have some yellow on my replacement, not nearly as bad as the original but it's still there. It's definitely usable but if someone in my house plans to do some graphic work in the future it may be a problem.

I can't do anything about replacing it now as i am going on holiday for a while.

Say i wanted to get it sorted in a month or so, it would be covered under warranty right?
 
thedon1 said:
I have some yellow on my replacement, not nearly as bad as the original but it's still there. It's definitely usable but if someone in my house plans to do some graphic work in the future it may be a problem.

I can't do anything about replacing it now as i am going on holiday for a while.

Say i wanted to get it sorted in a month or so, it would be covered under warranty right?
Click to expand...

just send it back for a refund and once you're back from your holiday just buy another one.
 
diegobgr said:
I've contacted with Apple Store.

They told me that I can receive a new one, and keep mine while it arrives.

The question is, if new one is worse, can I send the new one back and keep the original one?

:confused:
Click to expand...

did you say anything to them that will let you keep your iMac till the replacement arrives? I'm thinking of exchanging mines but school started so I need something till then.
 
Can someone tell me if my display looks normal??

I have cropped the top gray bar with the bottom gray bar.

And I think I will keep it because it could be worse.

THANKS!!!!:)


DSC00405.jpg



TOP
Yellowtesttop-1.png

Yellowbottom-1.png

BOTTOM
 
iCaleb said:
Can someone tell me if my display looks normal??

I have cropped the top gray bar with the bottom gray bar.

And I think I will keep it because it could be worse.

THANKS!!!!:)


DSC00405.jpg



TOP
Yellowtesttop-1.png

Yellowbottom-1.png

BOTTOM
Click to expand...

mines look somewhat like yours although for me, it seems yours has a light tinge on the left side? Mines is very subtle and its bottom half for me. Can't really notice if I dont try to look at it but it's there. I'm wondering if people has any better ones.
 
Yeah my lower bar is lighter than the upper bar but its not yellow anywhere.:)

Also if your iMac looks yellow go to display calibration and bump up the white level to 7000.
 
iCaleb said:
Can someone tell me if my display looks normal??

I have cropped the top gray bar with the bottom gray bar.

And I think I will keep it because it could be worse.

THANKS!!!!:)

.......
Click to expand...

My Photoshop is telling me, that the bottom of the screen picture has ~3% blue deficiency. Bottom of the screen seem to be lighter, but the screen is of the picture center, so some of the lens light falloff can be a contributing factor. Darker gray bands are slightly cooler (~4% of red missing) and the right side of the screen shifts towards blue, and right side towards cyan, but all this within ~2%. so overall not too bad IMHO.

Tom B.
 
Why take photos?!

The colours in the pictures are only as your camera sensor see them (not your eye) and then the image is compressed and then displayed on someone elses monitor! Which could not be the same as someone elses!
 
iCaleb said:
Can someone tell me if my display looks normal??

I have cropped the top gray bar with the bottom gray bar.

And I think I will keep it because it could be worse.

THANKS!!!!:)


DSC00405.jpg
Click to expand...

This is only about the second good screen I've ever seen. After white balancing the image to the screen (the screen was definitely cool due to the lighting), it looks about perfect.

Really, you are quite lucky to get a good one on your first try... People on here claim they somehow know the defect rate to be only about 1% but it's utter BS. I do not know and will not claim to know the rate, but assuming that 1% is true, the multiple people who have 4 bad screens in a row have a 1 in a BILLION chance of this happening to them. Meaning: A 1% defect rate is nearly impossible. It's likely much closer to 99% than it is to 1%.

Seriously... don't give your screen up for anything!

Questions:

How did you get this iMac? BTO (online), Stock (online), or Stock (in-store)?
Where was your iMac assembled? It's the first one or two characters of the serial number. (See quote below)

SaSaSushi said:
F, FC, XA, XB, QP, G8 (USA)
RN (Mexico)
CK (Ireland)
SG, E (Singapore)
MB (Malaysia)
PT, CY (Korea)
EE, QT, UV (Taiwan)
1C, 4H, W8, YM, VM, WQ, 7J (China)
RM (Refurbished/Remanufactured)
Click to expand...

Also, if you could back away from the screen more, center it in the shot, and remove whatever source is producing that yellow light in the room, we could get a better shot of the screen... I fear that the light in that room is so yellow that the entire screen has appeared blue, masking any yellowing. Also if you let the camera meter the light from the screen, it should white balance to the screen. Try the screen on 50% brightness if you can't get a well exposed shot. Also, a shot with the "Medium Gray" solid color background, no dock, and no icons would be best for seeing color uniformity...

If this screen really is good, I have hope to replace my 2009 iMac with a 2010 soon... and actually receive a decent screen.
 
DannyBres said:
Why take photos?!

The colours in the pictures are only as your camera sensor see them (not your eye) and then the image is compressed and then displayed on someone elses monitor! Which could not be the same as someone elses!
Click to expand...

Why calibrate displays then? A colorimeter uses sensors and software to determine if the color is right, after all.

Cameras are just fine for our purposes. Since we can't see all these screens in person.
 
iCaleb said:
Yeah my lower bar is lighter than the upper bar but its not yellow anywhere.:)

Also if your iMac looks yellow go to display calibration and bump up the white level to 7000.
Click to expand...

If you go some time back you can find, that the problem is called yellow screen, but only a part of the screen (usually bottom) was of yellow tinge. It is caused by a deficiency of the blue (sometimes as much as 15% - 18%!)
You can't remove it by simple changing global temperature of the screen.

Tom B.
 
Whats up,
Got my imac yesterday, 21.5". It does have a little yellow tint at the left bottom corner, but it is so light that it dont show on picture. Is there a way to fix it iwthout asking apple to repair or send me another ?

What is interesting is that I got a mini before the imac, and used it in a 23" 1080 samsung monitor (P2370). And while I was using the migration assistant I checked out both the iMac and my 23"LCD display for the yellow tint. The LCD was bizzarre more yellow than the iMac. So, what would you do if you got the yellow tint, it is very light, but its there. Should I take the risk of getting a worse one ?

Thank you very much!
 
vslo said:
Whats up,
Got my imac yesterday, 21.5". It does have a little yellow tint at the left bottom corner, but it is so light that it dont show on picture. Is there a way to fix it iwthout asking apple to repair or send me another ?

What is interesting is that I got a mini before the imac, and used it in a 23" 1080 samsung monitor (P2370). And while I was using the migration assistant I checked out both the iMac and my 23"LCD display for the yellow tint. The LCD was bizzarre more yellow than the iMac. So, what would you do if you got the yellow tint, it is very light, but its there. Should I take the risk of getting a worse one ?

Thank you very much!
Click to expand...

Only you can answer this question.

Tom B.
 
One of the easiest ways to spot this problem without analysing the test pictures is to load up iTunes and look at the alternating light blue and white lines that form the background of the main window. Just looking at mine now and the bottom half are all varying shades of yellow. Very annoying as this is my second iMac having had the first one swapped out after 3 screen replacements and being without this one for a week with a faulty graphics card.

Apart from the time without the machine, the main problem with putting it in to get the screen swapped is that you've no guarantee that the new panel will be any better than the one before and I've had one swap that was actually much worse.

Back to the Apple service agent tomorrow. There's also some grey smudge marks behind the glass as well, so hopefully they'll sort that out too.

Edit: What's the latest with this anyway, am going to try and check back through the thread, but it could take some time! Is there a known, guaranteed-fix or at least one that minimises the yellowing?
 
Got the iMac back after a couple of days. The smudges which appeared were just that apparently, smudges on the back of the glass, so they cleaned those, but in doing so have made some more marks on the inside of the glass. I give up, i really do.

As for the yellow, the agree its yellow but its "within tolerances". Really wishing I'd never sold my Mac Pro and ACDs.
 
diegobgr said:
Hello.

I have received my replacement, I know I'm wondering about what to do.

Both looks similar, both have some dust spot under the glass but I don't care.

iSight are dead pixels free. HD aren't noisy, the new one is WD and the old one Seagate.

The problem is the yellow tint.

What can you tell me?

4971329060_e01b45ceae_b.jpg


4970716031_9716cc42dc_b.jpg


4971329732_8b39ef297a_b.jpg


4971351516_1874802d6c_b.jpg


4971351904_da4eaceec7_b.jpg
Click to expand...


I had a quick look at your pictures and you do not, repeat, you do not have the yellow tinge problem.
I would keep both computers, but if you absolutely have to make a choice, the right screen (4971329732_8b39ef297a_b (1), the one with more components on the dock) is a little bit more uniform, the biggest problem being ~2% green in a small area in the very left bottom corner.

Tom B.
 
Hey guys.

I ordered a 27" imac, and it arrived like two weeks ago. I wasn't home when it arrived, so I finally got to pick it up this weekend and set it up.

I did the yellow tint test, and it seems to be tinted on the top right corner to me and along the right side. But I'm not sure if its worth trying to replace or refund, considering it's been a while and I also really dont feel like going through the process of replacing it. But if you guys think it's bad I'd ask for a replacement.

Any opinions? Thank you!
 

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HeySasha said:
Hey guys.

I ordered a 27" imac, and it arrived like two weeks ago. I wasn't home when it arrived, so I finally got to pick it up this weekend and set it up.

I did the yellow tint test, and it seems to be tinted on the top right corner to me and along the right side. But I'm not sure if its worth trying to replace or refund, considering it's been a while and I also really dont feel like going through the process of replacing it. But if you guys think it's bad I'd ask for a replacement.

Any opinions? Thank you!
Click to expand...

It does not matter what we think. What do you think?

It is hard to tell by photos. You say there is yellow in the upper right, and I can see that in the photo. However, it is really hard to tell how bad it actually is. That being said, if that was my machine it would get replaced. That yellow appears to be pretty bad.
 
Btom said:
I had a quick look at your pictures and you do not, repeat, you do not have the yellow tinge problem.
I would keep both computers, but if you absolutely have to make a choice, the right screen (4971329732_8b39ef297a_b (1), the one with more components on the dock) is a little bit more uniform, the biggest problem being ~2% green in a small area in the very left bottom corner.

Tom B.
Click to expand...

Thanks. Really.

Now, both screens have some dust under the glass. Well, it's invisible with screen on.

What should I do about that?
 
diegobgr said:
Thanks. Really.

Now, both screens have some dust under the glass. Well, it's invisible with screen on.

What should I do about that?
Click to expand...

Ignore it, or using a lint free cloth,wipe the inside of the plexi-glass panel. This is of course after you pry the top portion open. The bottom will be held in place by tabs. You may have to do this a few times until you get all the dust out. Removing the outer screen is really not a big deal at all. I do it by just using my finger nail to get it started. Once you do it a few times you will wonder what all the fuss is about.
 
symbology said:
It does not matter what we think. What do you think?

It is hard to tell by photos. You say there is yellow in the upper right, and I can see that in the photo. However, it is really hard to tell how bad it actually is. That being said, if that was my machine it would get replaced. That yellow appears to be pretty bad.
Click to expand...

It doesn't really appear so much yellow as it does kind of light greenish. It doesn't really bother me unless I look at it, or if the entire screen is a light color then I can tell.

I just don't know if its worth risking getting a replacement that might be worse.
 
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