I've had this HR20-700 since they were first released but now I'm getting 0% strength on Tuner 2. Tuner 1 has 95%. I swapped cables at the box, including the BBCs and that stayed the same which proves to me that Tuner 1 can get good signal off either cable, and Tuner 2 can't get one from either. DirecTV won't buy this of course and insists on sending a tech out to check it since its "signal related". Is there something he could do to "wake up" a dead tuner or is he just coming out here to swap the box?.