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Screen is broken. Can I use iMac 2012 screen?
Sorry no they are very different! Here’s the needed part: 21.5 iMac Display Assembly (Non-Retina 17), Apple P/N 661-0732121.5” iMac Display Assembly (4K 17), Apple P/N 661-07322 And here’s the guide to put it in: iMac Intel 21.5" Retina 4K Display (2017) Display Replacement make sure you use the iMac Opening Wheel so you don’t damage the display in the process of taking it off! Its part of the iMac Intel 21.5" (2012-2019) Adhesive Strips kit.