Well... D* instructed the swapping of the cables in the back of the DVR, I reported that it was then suggested to RE-SET the system, and that the result was "did not help" - meaning, still had the problem.
I see "cable" or "satellite" as a utility. The "provider" transmits the "service" into my home. Of course, if a pipe is busted in my yard, it's my pipe to repair. If the provider's meter is malfunctioning, it is not my place to repair. If I had Comcast Cable, I rent the receiver cable box. If it "scrambles" my signal (when I am paying for the service that is not coming thru) Comcast will replace the "box."
The roofer removed/replaced the dish, in the same roof deck holes. They were careful not to change any angle settings in order to replace it just as it was before. They say that they do this routinely.
You can view it as however you want, but the fact remains that D* will charge you for a service call if they have to send a tech out. That's why they offer the protection plan.
As far as your roofer goes, I've been to several service calls that were exactly like you described. Sure, they put the dish back in the same holes and think that's all they need to do. There are several issues with this.
1) Using the same holes - this means that the lag screws holding the dish down may not be as secure as they once were.
2) When they put the dish back in place, did they ensure that the mast was perfectly plumb? Of course not, unless they took the dish off the mast. If they did that, they need to repeak the signal. But wait, they're roofers and probably don't have satellite signal meters.
3) If they did take the dish off of the mast, how did they manage to get it aligned back up?
Remember, the dish is pointing to something about the size of a van that is located 22,000+ miles up in space. A fraction of a degree can make a big difference at that range.
To give you the benefit of the doubt, and since you haven't posted any signal strengths from any sat, here is a list of possible problems in order of likelyhood:
A) Dish out of alignment caused by your roofers
B) Damaged cable caused by your roofers
C) Bad connector
D) Damaged dish reflector/arm assembly - possibly caused by roofers
E) Bad multiswitch
F) Bad LNB
G) Signal obstruction
H) Bad receiver