I'm wondering if you have a western arc dish and the 129 signal is low, or if the check switch wasn't run correctly or the TV Resolution isn't set to 1080, 16:9. On Western Arc., the HD locals are typically on the 129
Grab your remote, hit the home button, then go to settings, TV, and see that the top box says 1080P, 1080i, 4K and the box under it is set to 16:9. While your're there, drop down to adjust screen size and make sure the green circles are set to fit in the corners..
Back out, hit diagnostics, then #3 for Dish. You can see your satellites here. If it's Western Arc, you'll see 110, 119, 129 and should have green check marks under them.
If it's Eastern Arc, you'll see 61.5, 72.1
If it IS Western, select Satellite 129 on the left, transponder 21 and see what your signal says. It'll probably be a lot lower than the other 2, depending on where you live. In Central IL, 110 and 119 should read in the high 70's and 129 in the mid to high 50's, for example