Replaced screen and phone turns on normal but won’t respond to touch

Hi. Looks like when the screen replacement occurred the home button was damaged either on the ribbon connecting to the button or one of the chips. The only option is to take it to apple to see if they can program a new button. This part is not replaceable on the 7/8 models.

There might be a loose connection somewhere. The first thing to do would be to reinstall the screen making sure all the connections are connect appropriately. Go slow and make sure you do it right. If you do that and it still doesn't work you may have a faulty screen. I hope that this helps you out