So I purchased a Vizio E420i-a1. It is 1080p at 120Hz. Problem is my TV will not recognize the computer. I a, connecting it with a ThunderBolt to HDMI cable and all the TV says is "No Signal". I've tried changing the Resolution and pretty much everything I know. Could there be an incompatibility with the fact that the TV is 120Hz? Thank you!! Also could this be resolved if I purchase a Apple TV? Was planning to eventually but seems like it will happend sooner than later.