Have you checked that the cables from are VERY TIGHTLY connected on rear of pvr? They come loose very easily over time or if you move equipment. Might be worth rechecked & undoing & then reseating cable by tightly TWISTING cable into the F Fplug connector & rescrew into pvr. It happens! Hope this solves your problem. Yes, it’s a brilliant pvr. I have several around home, all used pvrs that I have picked up. Built like tank! John L