When you say "every other" tsp, do you mean all odd or all even!HIPAR said:
Do you have another rcvr to try?
Could be any of three problems!
1) bad rcvr (not sending correct vltg)
2) bad cable
or
3)bad LNB
If you don't have another rcvr to try on that cable you'll probably have to have D* come out to isolate the problem!