I replaced my surface pro screen/digitizer and the screen doesn't power on. I bought another surface pro and transferred the screen/digitizer and it works on that one. Any idea what the problem can be? On the first one, I can hear it power on and I know its powered on because when I press the windows button I feel the vibrate. I cant tell if its the backlight because I see nothing even with flashlight and its a completely new screen/digitizer that works on the other surface.