My mobile display not working

Hello,
i m having nokia 1100 which accidently fallen down from table n its display was gone but now its display is visible but in a haphazard manner (it is not proper) some time it is there and some time it is with blank screen once the display was back but when i pressed the button it was gone and the screen remained with a horizontal line, when light went off the display came back but when i picked up the mobile or pressed any button the display gets disturbed