Wires not plugged in - DirecTV

I posted a question earlier. Since then I got the receiver rebooted. This is an elderly fellows TV and I saw that there are 3 wires coming from his receiver and only 1 of them plugged into his TV. I tried to explain to him the other 2 had to be connected. He has sound but no picture. Fairly new flat screen. Could this be a TV problem or the other 2 just plugged in?

This question, "Wires not plugged in," is about DirecTV channels, programming, equipment, and sports.