Before my HD10-250 was installed, I was getting excellent HD reception with a little TERK indoor antenna running directly to my TV's internal tuner. After they installed the DVR, I plugged the antenna into it--no signal. Thinking it might be some weirdness with the TERK and the HDbox, I went ahead and had DirecTV do a roof-top antenna install--same results. Excellent reception with the internal tuner, but practically zilch when running through the HD10-250. Any ideas?