Hi guys , i have a i9023which i recently changed the screen on as my misses dropped the phone. Just before i changed the screen it went dark and i was unable to bring the screen back up to its original brightness. After the screen change its still no better. I know my phone did an update just before i changed the screen and im just wondering if there was a problem with the update or is there a sensor that i need to change? Any help on this will be greatfully recieved. Paul.