I have an ASUS laptop with an HDMI port, and want to connect it to an old TV with RCA inputs. Bought an Etekcity Video converter which is supposed to be PnP, but images not showing up on TV. Should I treat the laptop as a projector? Run as a dual monitor? If so, what channel do I use for the TV? Obviously, I'm a newbie at this. Need some step-by-step guidance.