Answer to "Home button rapidly clicking after screen replacement"This is an issue with the haptic engine. Anything from minor bending or an unsecured connection and cause improper communication from the home button, to the haptic engine. If all is secured and well. You will need to replace the haptic engine. I have had to complete this repair several times. Fairly simple and a kit with tools can be obtained from amazon for about $25.00 There are severa turorials on YouTube for this repair.