Apple Logic Boards Replacement Parts And Repair | Mac Parts Depot
Amazon.com: Willhom Power Supply Board (185W) Replacement for iMac Intel 21.5" A1418 (Late 2012-Mid 2017) A2116 (2019) : Electronics
iMac 21.5" A1418 Mid 2017 Logic Board 2.3 GHz Core i5 - Non Retina Version | eBay
2017 21.5” iMac 4K completely died during a software update. Apple Store claims corrosion is the issue and that it requires a $500 logic board replacement. Has anyone seen this before? And is this actually corrosion or something else? Any advice would be ...