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Model A1419 / EMC 2806 / Late 2014 or Mid 2015. 3.3 or 3.5 GHz Core i5 or 4.0 GHz Core i7 (ID iMac15,1); EMC 2834 late 2015 / 3.3 or 3.5 GHz Core i5 or 4.0 GHz Core i7 (iMac17,1) All with Retina 5K displays

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Yellow tint on Late2015 27 iMac

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My screen has quite strong yellow tints over 3 corners as shown on picture. I know that previous generations of iMac had the same problem. So my question is: is there any way to fix it other that replacing the whole screen ?

I’ve recently got it open to add a PCI connected apple ssd. An experienced service company who worked on apple products have executed this operation. I was worried they caused some kind of damage to the screen as they were opening it to add ssd. When I asked them about this yellow tinting, their answer was:

“This is a typical issue with laminated apple screens. Sometimes diffuser corners at the back of the screen are mounted too closely to the panel, causing burn like yellow tints on dark colours when the screen is on. It is not a user fault, however Apple does not recognise this as a problem. It can even be seen in a brand new MacBook Pro 2018 laptops”

I admit it is not recognisable at all when I work during day with light colours. But it gives itself away with dark colours and high resolution videos/pictures.

How can I fix this ?

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Lets look at this in a different way…

You have a can of peaches (yes I know… what does a can of peaches have to do with my issue…)

Think how the can works it holds the peaches in a pressure vessel that prevents the contents from spooling after the canning process which kills off the bacteria. But, if you dent the can you can cause a leak which allows the peaches too spoil, and if the canning process was not done correctly the peaches can also go bad.

So what has this to do with my display issue???

Your display assembly is just like our can of peaches! It could be damaged or it could have been improperly assembled from the start.

If your problem only showed up after you had the system serviced then its likely the display was not properly taken off so the ‘metal can’ part on the back side got damaged. So the back is pressing on the sheets. It’s also possible heat was applied to the glass which was too hot causing them to wrinkle. The off-color is a clue heat was applied burning the liquid crystal material. See if a full white screen has yellowing around the edges.

So what to do???

At this point if this is really bothering you, you only have one direction replace the display assembly with a new unit.

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When in full white screen there isn't any yellowing around the edges; it is all clear white.

Correct me if I am wrong but 'The off-color is a clue heat was applied burning the liquid crystal material' means it was probably assembled improperly from the start ?

par

No, the heat would have been applied in the process of taking the display off. So, no yellowing with the white screen dim it a bit to see for sure.

par

I dimmed it to the lowest and no yellowing ( I am also adding the white screen pictures above). What do you think ?

I know that the service used ifix cutters to open the screen, the guy I interacted was very thorough...(I asked beforehand to be sure if they knew what they are doing).

par

Then you'll need to run the color calibration . Open the Preferences > Display > select 'Show Profiles for this display only' now click Calibrate button and create a new Calibrated Profile. See if that fixes things.

par

I tried it, did not fix the yellows. I guess I'll try and get used to it (Considering only option left is changing the whole display assembly)

par

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Alican sera éternellement reconnaissant.
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