Need help with laptop and tv display

[Roy Dennis]

If you have nvidea graphics it sounds like you have altered some settings there, try this:
Right click the blank area of screen, select properties, then settings tab, then the advanced button probably near the bottom. then select the GeForce tab at the top, a dialog should pop out to one side, click the + sign next to Geforce to expand it, then select flat panel settings, the main dialog should now show some radio buttons, if it is set to centered output that is your problem change it to "Display adapter scaling, then press apply and OK. Now check to see if your desktop fills the screen, you may have to reboot to finish this.
Let us know if that solves that part first, if it does but you are seeing the same picture on both screens let us know and I'll try and guide you on that.

If you don't have nvidea graphics it would be different.