IPhone 4 Black screen

IPhone 4 black screen and my phone lock button is spoiled! Help please!

Added (1). IPhone 4 stuck at black screen, like when you off your phone *

You have to give more information then that.

Http://www.ccchinachic.com/products/electronics/iphone-ipad-accessories/c-58/

Just get intouch with apple care and support.

Better to contact service center to fix bugs.