Speaker indicates a connection, but no music is playing

To resolve this issue, try the following:

Make sure your device is connected to the speaker
Make sure the transport controls of the audio device are set to playback audio
Make sure the speaker is not muted and the volume is up
Make sure your Bluetooth® device is playing audio, and the volume is up
Turn off or disable Bluetooth® on all other paired devices nearby (including Bose® preferred devices) and reconnect the device you want to hear
Turn the speaker off and back on