I attain settings from Directv receiver for zipcode I'm in and set the dish accordingly. I can be up and running in 10 minutes as long as I have a clear shot, with trees it takes a bit longer to shoot the gap. I locate sat 101 using receiver signal strength meter and a compass, then tweak homemade satellite stand (not dish) to gain 90%+ signal. Once done all the other satellites come right in and we now have all the same channels (HD & SD) we have at home including locals if we are still within NM.
I've have experienced bad coax, loose connections, faulty b-band converters as culprits to accessing a sat signal although lnbs can malfunction as well. We've only been camping in the four corner states over the last year and haven't changed our dish settings, still able to lock on Directv satellites without much issue using our Slimline 5 (SL5) dish. We used the 18" dish for years and acquired a used HD dish from Ebay several years back, heard and read they we're difficult to point, but I found them to be just as easy once you get the hang of it. Here's hoping you get it figured out, although we don't watch much TV when RVing, if we wanted to watch the big game or a particular show we have access to it and that makes DW happy.