Attempted fixing my iphone 4s screen. everything went good until the piece i was given, i realized was faulty, it was actually missing a ribbon at the top. anyways, i put my cracked screen back on and its white-ish grey 3\4 across the screen with a yellow\green tint on the last quarter. the phone is still in perfect working condition except i can't see anything i'm doing. what needs to be fixed? if i get another screen will it take care of the problem?