I have a MacBook Pro and a Magnavox HD TV. I have a mini displayport to HDMI cord. I also have a HDMI to VGA cord. My TV does not have HDMI, it has the VGA (PC IN) port, which is why I bought those cords. When I connect everything, and put my TV's input as PC, it says "No video input". Am I doing something wrong? How do I connect my Mac to my TV?