I’m just trying to set up my new Polaroid HD LED 32” TV. I was just trying to set up the settings. The only one I wasn’t sure about was whether to select air cable or cable. I do not have regular cable service, and use a roku 2 box, so I selected the air cable setting. Once I inputted the settings, it says “Please run channel auto scan”. I ran it several times, and it keeps saying to “please run channel auto scan”. What do I do? Also, I connected the red/yellow/white cords from the roku 2 into my TV, but I notice there is only one set of inputs. Does that mean I cannot connect my DVD player to this tv????