Apple iMac A1418 21.5" 2012 -2019 No Power Does Not Turn On Power Button Bypass
In this video I am diagnosing failed power button on 2015 iMac 21.5". Power button was removed afterwards (lots of heat from the back side to soften the double-sided tape it's held with) and repaired (one of the wires inside came off and had to be resoldered)