I cannot get the drop down box for multiple dispaly to appear. I'm using a HDMI cable. I plugged it up to my TV and nothing happens. I did the steps to shut down my computer, then turn the tv on first, and then my computer, still nothing. I even pushed the button on the bottom left hand side of my computer, it goes black for a secong the says Game Mode No Video Signal. Even when i click on the detect button it says, Didn't detect another display. in the display example box it only shows one blue window with a 1 in it.