OK so my problem is my Mac book screen is black after googling I realized I sorta broke the link to the display connector,I have read your guide on how to hook up a Mac book pro to a TV/HDMI display would this still work for me ?even though I have no way of seeing the screen on my Mac if I hooked the cords/adaptors up to my Mac and closed the lid would it still switch to HDMI display on my vizio please and ty