I have a Toshiba Satellite laptop, running Windows 7. I had it connected to a Sony HDTV and everything was fine, except I noticed when the TV was displaying the desktop, the laptop screen went black. In my effort to fix this, I made a mistake. Using the desktop display on the TV, I right clicked and opened Screen Resolution, and then Display Settings. In error (I know now) I accidently set the display so only the laptop could display the desktop. Now I have no display on the TV, and since the laptop screen has gone black, I cannot see to change the display options back to the correct ones. Help!!