I have a H20-100 getting 771 error. I have tried everything from replacing the BBC converter, to moving my H20-600 to the room where the 100 is to make sure it wasnt the cable. I even tried moving the cable around on the WB616 switch to make usre it was not a bad output on the switch. Nothing has helped. My H20-600 works fine so could it possibly be a bad reciever?