I have a 301 receiver and a superdish with great signals on 110,119,and 121 but when I run check switch on my dp34 it only shows 110. It will not show 119 or 121.
Welcome to SatelliteGuys... try unhooking feed into receiver, then do a switch check. Then hook the coax back up and do a switch check and see what happens... btw if you have any kind of switch with power inserter unplug it and to be safe receiver before unhooking and hooking coax back up. I do not have a superdish so I'm guessing here...
Dish equipment sure is crappy, few times, I did the check switch on twin plus, although its only for 110/119, but the third satellite always showed in red and error.