Here I’m repairing the dark spots at the bottom corners caused by fine dust inside the screen, This is a common fault which most people have to put up with if your Mac is out of warranty.
This should work with all slim iMac’s which you can do yourself instead of paying £££’s for a complete screen. Good Luck Enjoy the video!!
Wet and Dry Wipes https://ebay.us/gRSkLX
ESD Anti Static Tape https://ebay.us/pwEwjV
iMac A1418 A1419 21.5 27 Screen Opening Tools Kit Adhesive Stickers Strips https://ebay.us/tj5g3M