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Model A1419 / Late 2012 / 2.9 & 3.2 GHz Core i5 or 3.4 GHz Core i7 Processor, ID iMac13,2

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Monitor has vertical lines at start-up.

At the startup chime the display comes on with these vertical lines. As the boot-up continues the screen color changes indicating the system is running. I accessed the the diagnostic LEDs, all 4 are lit.

Do I need a replacement display or logic board?

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Your display panel is damaged, you can prove that by hooking up an eternal display as the image on it will be clean. This is a common issue with the newer Thin series as the display is glued on so if you don't use the correct tools and techniques to remove it you can easily damage the display.

Here's the needed tools:

And Parts:

And here's the guide which you need to follow: Substituição da tela do iMac Intel 27" EMC 2546

Imagem de Plastic Cards


Plastic Cards


Imagem de iFixit Opening Picks (Set of 6)


iFixit Opening Picks (Set of 6)


Imagem de iMac Intel 27" (2012-2019) Adhesive Strips


iMac Intel 27" (2012-2019) Adhesive Strips


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Yes, I believe you are correct. The trick in my situation was the external monitor would not actually work unless I disconnected the display panel from the logic board.


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Jack Granato será eternamente grato(a).
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