I have an arc and have just purchased 2 Sonos one SL's to try and create a surround system. Initially, all went well, everything was connected and working fine. I then became aware there was no sound coming out of the ones and they had a flashing green light. I factory reset them, re-added them to Sonos added them as surround speakers and they instantly flash green as soon as they are set up. I have totally factory reset the entire system and yet as soon as they become surround speakers they flash green. Any help would be gratefully accepted.
Best answer by Corry PView original