Me too.... I have had the 350 for about two years and was operating correctly with my Virgin TV box.. then all of a sudden, I can see the TV picture and hear it - but none of the commands for remote operation work either on my computer, phone or on my tablet.
This is the second Slingbox device that I have had. My first - the original also stopped working completely.
Getting quite expensive to keep replacing them!
Did you ever find a solution?
I have had no problems with my 350, via computer, or iphone. All of a sudden the remote stopped working. When I select any button on the remote it will pause the screen momentarily then return to the program. I have tried resetting the sling box and also reconfiguring the whole thing with no luck. I get a connection because when I log into my slingbox it will broadcast what is on my tv and if I change the channel on my tv then sling box will follow. the problem is the remote that I select is not working , even thou it is the correct one for the cable company I have (Buckeye digital) and the correct set top box Arris Moxi MP2000NA. So I don't know what happened but the remote was working and now does not. ANY IDEA'S ????