I don't have Internet or cable television at my house, so my laptop stays hooked up to my tv via HDMI so that I can just play my games/DVDs through the big screen. This setup has worked fine for the past 2 years, but this morning it stopped working. When the HDMI cable is plugged in, the laptop screen goes black and the TV only duplicates the wallpaper and none of my programs. How do I fix this?