No HD channels on one of our boxes - DirecTV

This question is about "No HD channels on one of our boxes", with DirecTV channels, programming, equipment, and sports. We have one box upstairs, it had no problems, all SD and HD channels come in just fine. The box downstairs, an H20, only gets the SD channels. All HD channels come in with the banner at the top and a black screen, no sound. I've tried the reset button a few times, and have unplugged it as well. No luck. Any ideas? Thanks

This topic covered No HD channels on one of our boxes, and DirecTV satellite tv service.