The replies to the OP are very confusing. 99s and 103s carry only spotbeams delivering HD locals. That means many people get zero or low signals on most of the transponders, because the spotbeams are not pointed at them, that's quite normal. The 99c and 103c screens show all the transponders delivering the national HD channels (CONUS). All the transponders on 99c and 103c should be at least 80s, preferably 90s.
However, it would be very unusual to get zero signals on ALL the 99s/103s transponders. What is your zip code?