Dave,
I have followed this thread with a lot of interest because I have never heard of something like your situation occurring before. If I understand your situation correctly you never moved your rig, but service on the lower channels was there one day and not the next. That is very bazaar!
And very frankly, since you did not move in the 24 hour period mentioned and you had great signal strength on all three essential birds, most of the suggestions were well intentioned, but off the mark.
My first thought was that something went amok with your tilt setting. On our last trip I failed to set the tilt on one of our stops (which is the last adjustment I make) and some of the channels on the KA birds did not come in. It was not a consistent pattern like you experienced, but it did cause problems on some channels that we sometimes watch. As I disassembled the dish I noticed that I had inadvertently left the tilt at 90 degrees. (It was amazing what we got with that crappy setting.) I was reluctant to post that as a possible problem to your situation since you have an automated dish and that setting was probably OK.
Now that you have posted what resolved your problem, the only thing that comes to mind was that somehow (and I have no idea how) something went amok in your authorization. This can usually be fixed by logging on to your DirecTV account and "re-authorizing" your account. That is essentially what happened when you changed your service address and had things re-authorized.
I know it would be fun to think that DTV receivers had GPS units in them, but there is really no logical reason to do so. And they would not work in our S&B house since we have a steel roof and no GPS signal can get through and everything works just fine in the house. Your issue was either a bad tilt alignment or bad authorization. Given that changing your service address fixed the problem, I am going to assume the latter.
Like I said, you had a very bazaar situation. I doubt you will ever see that again.
Bob
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2003 Beaver Patriot
2014 Honda CRV Toad
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