Hi, My friend had a temper tantrum with his girlfriends phone and lobbed it at the wall. I had a look at it, the back cover was cracked and the LCD displayed nothing at all, no backlight, etc. But if I attempted to power it on and then pressed buttons where the locked keys keypad would be it would vibrate after i pressed 4 digits. My assumption therefore was that the LCD/Backlight had gone and also the rear case/cover needed replacing. I ordered a replacement screen and back cover which have now turned up. I fitted the iPhone 4 screen (I've done one sucessfully before) and powered the phone on. It powers on but all I get is a white screen. I can just about make out some lettering. I can do screenshot pictures (quick press on Home button and lock button), lock it and the home button responds. If I attempt to sign into the phone I don't get the silent keys, but button tones as if you were dialling a number. I can only think it isn't registering the side swipe and is instead putting it to the emergency call function? In either case the screen is completely white. Here's what I have tried so far: Reseated battery Reseated all connections Tried the holding down the lock and home button for 30 seconds Tried a different battery from a known working iPhone 4 Tried to look at the phone in iTunes but it says it is locked I'm out of ideas now, unless the LCD I ordered is faulty? Any suggestions? Thanks.