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crwdns2944351:0crwdnd2944351:0iMac Intel 21.5" Retina 4K Display (2017) RAM and SATA Hard Drive Upgradecrwdnd2944351:0crwdne2944351:0

crwdns2933797:0Jeff Suovanencrwdnd2933797:0crwdne2933797:0

crwdns2936043:0crwdne2936043:0 crwdns2933505:0crwdne2933505:0 Jeff Suovanen

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Introduction
This guide details removing the logic board in a 2017 iMac 4K in order to remove or replace the RAM and the hard drive. Some images in this guide were taken from the 2015 model, which has some small visual differences.
If you are replacing/upgrading your hard drive, be sure to [https://www.ifixit.com/Guide/Clone+an+Existing+Drive/16409|clone your existing hard drive|new_window=true] onto the replacement drive prior to performing this upgrade to keep your files and operating system in place.
Opening this device requires cutting through adhesive that will need to be [https://www.ifixit.com/Guide/iMac+Intel+21.5-Inch+Retina+4K+Display+Adhesive+Strips+Replacement/64210|new_window=true|reapplied] after you finish the repair. Be sure to test your new RAM before sealing the iMac with the adhesive strips.
This guide is marked "potentially dangerous" because it requires you to handle a power supply that contains large capacitors. Unplug the iMac and hold the power button down for at least 10 seconds to help discharge the capacitors. Handle the board by the edges and do not touch surface components.