i recently bought an iPhone from somebody, and the LCD had gotten broken so i had someone i know fix it for me (for a price). and then after a while, the screen went out. you could hear clicks and sounds when you press the screen but the screen was turned off. i gave it back to that same friend and he fixed it again. and a couple of weeks later its doing that same thing again. i don't want to go through that same friend again so i am wondering if i can take it to Apple and would they be able to fix it? the phone is jailbroken but i can still restore it, but im wondering if would they be able to tell if the phone has been fixed by an unathorized person and also if they would still be able to fix it since i had bought it off of someone?