IPhone 3GS fell and won't turn on?

Fell out my pocket on a night out. Picked it up and no response, at all. Pressed the "home" botton, nothing.pressed the lock button, again, nothing! Put it on charger when I got home, no response, wouldn't accept the charge.plugged it into my laptop to try sync it with iTunes.wouldn't even find the phone it the devices. There's zero, scratches on the screen, no damage to the back and LCD is intact! Can someone please help me out?

Added (1). P.s tried hard reset, didn't work

You obviously messed it up. Just cause their is no physical damage on the outside doesn't mean that the internal hard drive isn't messed up. Should of had an Otterbox. Take it to the Apple store.