Green Screen - DirecTV

Hi all,
Our tv is only showing a green screen. We have a Vizio with SmartCast and are able to play anything off that app normally. Our tv is only a few months old. Direct tv sent us a new receiver but it did not solve the problem. We have spoken with technical support and it was not helpful either. I have read some posts saying that people have had similar problems and it is related to their HDMI cable. Any suggestions? Thank you!

This question, "Green Screen," is about DirecTV channels, programming, equipment, and sports.