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모델 A1419 / Late 2012 / 2.9 & 3.2 GHz Core i5 또는 3.4 GHz Core i7 프로세서, ID iMac13,2

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Monitor displays banding, external monitor displays good image

I left my iMac for a moment and came back to a screen showing horizontal banding and distortion. I tried running diagnostic tests but they didn’t show that anything was defective. Just to be curious, I attached an external monitor to the computer through mini display port. The content on that monitor is fine. So, is the issue likely with the internal display, the graphics processor, or a bad connection? If it is an issue with a connector, then I can fix that. However, a bad display or processor are different stories. I am not going to sink money into a repair that I cannot afford right now.

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Your symptoms point to a bad display assembly. The easiest way to fix this is just replace the full assembly. Its possible the T-Con board on the back of the display is bad and not the complete display you might be able to replace it alone. See if you can find the same display assembly which has a bad LCD which you can steal the T-Con board (don’t spend too much). If you’re lucky that might fit things.

In any case make sure you use the correct tools and methods in removing the display assembly as many people damage it in the process of taking it off. Follow this guide: iMac Intel 27" EMC 2546 Display Replacement You’ll want this kit : iMac Intel 27" (2012-2019) Adhesive Strips As well as these: Plastic Cards & iFixit Opening Picks (Set of 6) if you have the needed screw drivers. If not you might as well get this tool kit: Pro Tech Toolkit plus the plastic cards.

iMac Intel 27" (2012-2019) Adhesive Strips 이미지

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iMac Intel 27" (2012-2019) Adhesive Strips

$19.99

Plastic Cards 이미지

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Plastic Cards

$2.99

Pro Tech Toolkit 이미지

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Pro Tech Toolkit

$69.99

iFixit Opening Picks (Set of 6) 이미지

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iFixit Opening Picks (Set of 6)

$4.99

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Sam Curcio 가/이 대단히 고마워 할 것입니다.
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