Music will only play in the first zone added to a group. The other zones in the group appear in the group but they have no sound. We have had this Sonos system for 9 years and this i s anew development Has never happened before. The zones are not "muted." We have tried resetting, using various controllers, starting "fresh" with groups, etc. This seems to have happened following the power outage in SB on Saturday night. How do we fix this?
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