I've been having this problem with an hr20-100 for a while. I also have an hr20-700 and hr10 that never have problems. It's always sat in 2 regardless if I switch cables. I even tried an SWM-8 to see if that would help and it didn't. So I know it's not the switch or cable from the switch. Could it still be the LNB, grounding block or cabling? Or, is it probably the box?