My daughter dropped her EVO 4G and the outer glass didn't crack but when you turn it on it has pretty much a black screen except where you can see the cracks below the glass, appears as white lines on the screen below or lightning??? Is this the LCD portion that is cracked? I am hoping this is all that is wrong, as I will replace it myself. Is the outer glass called the digitizer? Sorry for the newb questions, just trying to learn.