Late to the party - I know but . . . .
Open up the device and locate the ribbon feeder from the digitizer screen - it's about one inch to the left of the camera lens looking from the front with Samsung lettering at top. Lift the catch with spudger or finger nail and relocate the ribbon squarely and as far in as possible. Lock with catch, switch unit on and try with finger - if not successful try and try again as Robert the Bruce was wont to say!