Whenever you replace a damaged touch screen on an Apple iPad (mini), don’t forget to put back the magnets. The magnets are used in combination with “smart” covers that use magnets to attach to the iPad’s built-in magnets.
If you place the Apple iPad down flat with the camera at the top and the home button at the bottom, and with the screen facing you, the magnets are located in the top right hand side and bottom right hand side. Think about how you open and close a book – this is is where you want to place the magnets; on the right hand side.