I have a 722 receiver connected via HDMI to my TV and I also have an OTA antenna connected to the receiver. My question is this: I had to disconnect everything to install my new tv and stand last week, and since then, I no longer have my OTA channels. If I try to re-scan, it comes up with nothing. I checked all of the connections coming from the antenna and all are good. Is is possible the OTA tuner went bad?