I had a dilemma this past weekend and I am looking for some help. I have an HR24-500 that I take in my RV. When I turned it on, I could only get signal on tuner 2. Nothing on tuner 1. Thanks to the inability of telling the receiver to only use tuner 2 (it uses tuner 1 in single mode), I was unable to watch anything. I am disgusted Directv gives you no options to select the tuner to use, or that the software is not smart enough to use the tuner that actually works. Even the guide download after redoing SAT setup, never budges from 0%. I tried everything I could to fool the receiver, but I am the fool. I suspect the LNB has checked out, but being 3 hours from civilization made it impossible to make a call or get a new LNB. Anyone know how to fool the system?