My old system included 6 HDDVRs. Yesterday, I had Genie installed with three clients and removed four of the HDDVRs. I kept two and they are networked with the Genie. I have an HR23 with the external AN21 OTA tuner. It has always worked flawlessly and was working following completion of the installation. Last evening it froze up and no longer sees an OTA signal. I've checked all the connections and can't determine what happened. Satellite locals are fine. Any help and insight is greatly appreciated.