Troubleshooting MRV van be very difficult sometimes in person and darn near impossible on line.
First off, like said, check and make sure your sharing is still on.
However, since this is not something that could accidentally be changed, I will assume it is and move on.
Try resetting receivers (do one at a time).
Is it wired in to your internet?
If so, how?
If it is plugged directly in to the back of an 24 series then unplug it.
Plugging your router in the back of a 24 series will shut off the internal deca.
If it is not a 24 series, then are all the lights on the decas green?
Is the power inserter, splitter, and LNB all green label?
Even if it worked before, if one of the parts were not, it could work for a while then quit (especially if your internet is plugged in).
Check all connectors from receivers to dish (unplug power inserter first)
Make sure they are all compression, stingers are not too long and "the glass is filled up with milk" (white dialectic is pushed all the way up to the top).
Make sure there are not added splices or splitters in line. If there is a splice, check if the barrel is a high frequency barrel (best are blue or orange center, if it is red or green it is probably ok, if it is white, replace it). If there are multiple splices then replace the line with R6 and preferably swept tested to 3ghz.
That will scratch the surface for you.
