Reclaim your video chat capabilities, use this guide to replace the FaceTime camera cable on your 21.5" Retina 4K 2017 iMac. [ … ] Some images in this guide use a 2015 iMac, which has minor visual differences. These differences do not affect the repair procedure. [ … ] 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+%282017%29+Adhesive+Strips+Replacement/96196|new_window=true|reapplied] after you finish the repair. Be sure to test your new parts before sealing the iMac with the adhesive strips.