Dim LEDs on my Note 4's screen

Dear guys;
I own a Galaxy Note 4 which is no longer under warranty and I've just spotted that some LEDs in a row have got dim. Actually, to check the led lights I put my phone's screen under the microscope and just figured out that the problem is with the blue LEDs (some blue LEDs were producing less light there and the other LEDs were OK). I also checked whether it was for an effect or something but actually it was not. Actually all I found about the case on the web was about the dead LEDs (but my LEDs were still working) and I didn't find anything useful.
I'd REALLY appreciate it if you guys give me a solution to the problem because it's REALLY annoying. so thank you in advance :)
I wish you all the best
 
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