Trying to run a 9400 and a 6400 using 2 of the 4 lines from the quad LNB. The 9400 has failed to pick up any signal at all from the start. The 6400 showed green for both satellites and had climbed to 92% signal then dropped back to 0. A check switch on either gives the "less satellites than originally detected" error. I tried running one of the lines into a 3100 and it gets 0 signal. This is where it got weird. It's definitely the quad LNB, Bell tech support verified that for me. But if I run 2 of the lines into an SW21 (which I realize should not be required) and connect that, the 3100 gets 100% signal and is solid as a rock. The two HD recievers still get nothing. I know for sure they both work, I got them from a friend and saw them working at his house before I bought them. Both are verified removed from his account and added to mine.