If your other channels on that same TP are fine then it could simply be a problem with the station broadcaster (so there's nothing you can do). Otherwise, you'll see the same problem with other channels, then I would check dish alignment.
Dsh asked: "What else can I check to troubleshoot?" There is God between you and the satellite and He sometimes sends electro/magnetic storms and such like. You can either talk with God (a difficult task at best) or talk with somebody else in your neighbourhood scanning the same TPs