I have a Sony receiver STR DE-915 that is 3 or 4 years old and have had it connected to speakers for surround sound. It was working fine until we recently moved to a new home. When I tried to set up the speaker connections in the new home I cannot get any audio to the rear speakers. I have tried the surround test tone and the front and center works fine, but no rear. Could some setting that I am not aware of been changed in the move. I can usually figure stuff like this out, but I'm at a loss on this one. I don't want to take it in for service until I'm sure its not something simple that I'm overlooking. Any help would be appreciated! Thanks!