Time for new satellite antenna?

The Pathway has a full sized 18" antenna inside that dome and will give you the best signal available with a single LNB antenna. All dome systems, including your Tailgater, contain only 1 LNB and the antenna simply re-points itself to the different satellites (110, 119, 129 in your case) as you change channels. It seems odd that 110 and 119 are getting a good signal but 129 is not since it is the same LNB and the same antenna. You might want to ensure that you don't have something blocking your view to that satellite. We make assumptions that if we can see 1 we must be seeing them all. It takes very little to block the signal to the small antenna inside a Tailgater. If you download the app called Dish Pointer by Augmented Reality, you will be able to actually "see" the satellites from the antennas point of view to help you verify that this is not the problem.