Hi. I'm new to this forum, but saw the original poster's problem, and I am having the exact same problem.
I have re-set my HR20 about 12 times since the DirecTV tech came and set it up yesterday.
I keep getting the message "Searching for Satellite Ln 1". I've shut it down, switched the cables, and done a full reset and I get the same message (which tells me it isn't the cables).
Also, after each reset, I check the signal strength and for Line 1, usually the first 5-10 transponders are okay, but the rest show a signal strength of 0. Then I check Line 2. All transponders show adequate signal strength (with the exception of 18 and 26 which read 0 -- which I understand for these two transponders is normal).
Then I check back to Line 1, and now all the transponders read 0 signal stregth.
The Directv tech can't get back until Friday, and I am really frustrated and disappointed with DirecTV over this issue. I had to wait two months to even get the HD DVR (wait listed) and now it doesn't even work!!
I've been with DirecTV for over eight years, but this really makes me want to go back to cable.
Edit: Sorry for venting. I'm just frustrated.