Fixed it! Like magic, I turned off the OPC feature (backlighting) on the Aquos and the HR20 responds to the remote control! The HR20 is on a shelf directly below the OPC sensor on the Aquos. Too bad I wasted hours and hours with Directv's support! Life is good again.

HR20 Remote Control Issues I too am having a nightmare with a newly installed HR20 DVR and an upgraded 5 LNB dish. I am about to receive my third replacement. The receiver's behavior is so freakish that Directv thinks I am some kind of nut. During the daytime, the receiver responds perfectly...