Why won't my iphone 4s screen work? - 2

It turns on and the buttons work but when i try to unlock the screen just doesn't respond.It also keeps turning on and of on its own.

Hold down the home button and the lock button together for a total of ten seconds until you see the apple logo and then release the buttons, once the phone as booted back up there's a fair chance that the phone will be fine.
If however the phone is not working properly still then come back and ask the question again and i will help you further

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