Try a red button (inside card door, on side of Minis) reset of the Directv receiver. I assume you understand that the way to play HD programming is to set the guide to "hide SD duplicates" and connect the TV by either HDMI or component cables.
It is connected with hdmi cable. When tech installed we did not have hd tv in bedroom. He said we would need to change resolution to 1080 and that's what I was trying to do. I'll try red button. Thank you