I replaced the charging port on my Note 3 today; easy peesy, but not my screen won't turn on. The phone powers on, but nothing on the screen. It is such a simple procedure; I don't understand what could have happened. I haven't put the screws back in yet; but in the video, he checked his before putting them back in, and it came on just fine, so it doesn't haven anything to do with that. I'm at a loss!!