Hi Dave, and welcome to the forum.hi,
Just replaced my iPad mini touch screen as was cracked very bad.
It boots up but does the following
A) will not rotate screen
B) when you press around the home button the iPad locks
I think I've put the magnets back right from what I saw.
Any help greatly received
Dave
UK
replacement touch screens for iPad minis are fragile, glitchy and just all around miserable in general. Make sure your ribbon cable is not pinched between the glass and frame, all of the good parts are covered in tape and that there is no debris caught between the glass and frame.
With that being said , it sounds like a defective home button circuit is causing your problems. You will likely have to try another replacement touch screen.