There is a very faint dark line (seemingly random) on my screen

Question

iMac Intel 27" EMC 2390

모델 A1312 / Mid 2010 / 3.2 GHz Core i3 또는 2.8 & 3.6 GHz Core i5 또는 2.93 GHz Core i7, ID iMac11,3

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rene @rene52438

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게시일: 2015년 10월 16일

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There is a very faint dark line (seemingly random) on my screen

I have a seemingly random looking, diagonal, line on my screen. It is only visible with colors like (dark) grey and blue. Black is too dark (it won't show) and white (or other light colors) won't show the line either.

I made a photo of the line, and in the photo it is not too visible, but you can see it. In real life it is not much more visible either, but since it is there, I want to know if I can expect other problems, or if I can fix it.

Thanks for your help

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Can you give us some history of this system, was it serviced before?

Dan 의 2015년 10월 17일

Looks like a single line without any pattern, I would exclude the moiré line. Looks more like a bad LCD to me.

oldturkey03 의 2015년 10월 17일

The iMac has been rarely moved. Primarily used in an office. Never upgraded or opened the iMac.

rene 의 2015년 10월 17일

It is indeed a single line without a pattern. Moire line seems more of a pattern to me indeed

rene 의 2015년 10월 17일

yup, it has to be a pattern to be Moiré lines. My money is on a bad LCD :-) Not sure how much this line bothers you, but I'd continue using your system the way it is and postpone any repair for now.

oldturkey03 의 2015년 10월 17일

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Dan @danj

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게시일: 2015년 10월 17일

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What you are seeing are Moire lines converging. The cause is the intersection or the warping of the light signals. In some cases signal leakage can also cause this.

Often moisture gets between the cover glass and the LCD panel or the LDVS cable is bad. In your case I suspect the cable is bad.

Looking at your image again Old Turkey I think is right! You have a bad LCD.

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It is a single line, without a pattern. Moire lines seem to have some pattern.

rene 의 2015년 10월 17일

So what does bad LCD mean in terms of the future. Is it still good for a while?

rene 의 2015년 10월 19일

realistically you should check the connections first, but it should last for some time, I would recommend a replacement if necessary as soon as possible though

megmgmn111 의 2015년 10월 20일

@Megmgmn - The issue is a defect within the screen its self. While the screen has damage its more of a distraction here.

Dan 의 2015년 10월 20일

댓글 달기

Can you give us some history of this system, was it serviced before? — Dan
Looks like a single line without any pattern, I would exclude the moiré line. Looks more like a bad LCD to me. — oldturkey03
The iMac has been rarely moved. Primarily used in an office. Never upgraded or opened the iMac. — rene
It is indeed a single line without a pattern. Moire line seems more of a pattern to me indeed — rene
yup, it has to be a pattern to be Moiré lines. My money is on a bad LCD :-) Not sure how much this line bothers you, but I'd continue using your system the way it is and postpone any repair for now. — oldturkey03
It is a single line, without a pattern. Moire lines seem to have some pattern. — rene
So what does bad LCD mean in terms of the future. Is it still good for a while? — rene
realistically you should check the connections first, but it should last for some time, I would recommend a replacement if necessary as soon as possible though — megmgmn111
@Megmgmn - The issue is a defect within the screen its self. While the screen has damage its more of a distraction here. — Dan

iMac Intel 27" EMC 2390

There is a very faint dark line (seemingly random) on my screen

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Update (10/17/2015)

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