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Model A1419 / EMC 3070 / Mid 2017 / 3.4, 3.5 or 3.8 GHz Core i5 or 4.2 GHz Core i7 Kaby Lake Processor (ID iMac18,3) / Retina 5K display. Refer to the older iMac Intel 27" Retina 5K Display (Late 2014 & 2015) guides as the system is very similar.

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Why is there a single pixel line down my screen?

When I upgraded my iMac HDD Fusion to SSD and NVRam SSD, when I replaced the screen, I have a single green line down my screen to the right. I was EXTREMELY CAREFUL with the screen when pulling off the old adhesive and reattaching and there is no damage to the screen, so I have no idea how or why this line appeared. Could it be a software glitch and is there a way to fix it?

I can deal with it but it is VERY annoying!

Answer this question I have this problem too

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You have a LCD TAB error which is caused by either physical damage or a defect in manufacturing.

In this case I fear you inserted your tools a bit to far in, hitting the display panel ribbon cables.

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Did you follow this guide to the letter and use the proper tools? iMac 27" 2017 Display Replacement

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