I have a H20 at my travel trailer in Dallas. I have another HD receiver at my home in Jasper Tx, 6 hours away. The H20 in Dallas has worked fine until last night. The dvd player was on, I hit input to flip over to directv and I see a picture for about a second and then the receiver turned off. At first I thought maybe I had hit the wrong button. I turn the receiver back on and it goes into the searching for signal. I hit the red reset button, I unplugged for several minutes, I finally went to the setup and it shows all zeros for the signal. The dish is mounted on a pole about 6 feet off the ground, everything appears to be tight. I don't know if I have a bad dish, bad receiver, or if the dish needs re-aimed. Where do I start?