Ipad Mini Touch Screen Not Working Properly. This has cropped up as an occasional problem for the iPhone and larger iPad as well. Make sure that your fingers and the Touch ID sensor are clean and dry For the Touch ID sensor use a clean lint-free cloth to wipe off any dirt or debris.
Hard reset Hold the home button and the power button till you see an apple logo and then release it. Press and hold both the Home and the Top or Side buttons until you see the Apple logo. Press the Home button and Power button simultaneously and hold them for almost 10 seconds until the Apple logo appears on the screen.
Now turn on ipad after apple logo all should work fine.
Press and hold the power button When slide to power off appears on the screen of your iPad release the power button and hold down the home button Keep holding the home button until the home screen appears. Wait till the iPad shows the home screen and test it again to see if the problem is solved. After that connect battery back next connect screen and then connect your new digitizer. To do this double press the Home Button tap and hold on the app until it jiggles then press the - sign to close it.