my iphone won't work please help

[jmutd]

i have an iphone 4
a few hours ago it completely stopped working i tried everything,i held the button on the top for 10 seconds,i tried charging it,i plugged it into my pc but nothing happens
the screen is just blank
YES I TRIED CHARGING IT

 

[Gregoris]

just the power button or did you do a hard reset? did you try dfu mode also?