Hi, i have a big problem. Yesterday i changed the LCD screen on my iphone 3g, then after i changed the screen i turned the phone on. but the apple loge didn't appear. I have tried to reset and restore it but neither worked. Then today i just pressed the buttons randomly and suddenly the apple logo came on and the phone worked perfectly. But only for a minute after that the screen went completely white and then it just turned off. After that happened i tried to reset the phone and i took it apart again to check all the connection. But none of it worked. Does anyone know what to do, i am seriously desperate !!