you can use the "window key" + "p" to launch the menu that gives options to choose how you want to split the monitors. you can then choose Projector only. then your laptop screen should turn off.
What type of cord would I use to connect my laptop to my TV? And what TV option? *TV is a Insignia 32" HD TV 720p*
*Laptop is a Toshiba Satellite C655D-S5303*