I recently bought a Directv DVR and it worked great for a couple of days. All of a sudden I was unable to geta hood signal on the second line connected to the the DVR. Today, I can't get a signal whatsoever. I checked all of the cables, and everything was connected properly. I even tested the cables and none of them seem to be faulty. I've called and spoke with Directv and they kept telling me to try different things and nothing worked. Has anyone seen this problem before?