Troubleshooting : Alexa not responding
Short answer
The likely cause is that the microphone is muted on the speaker. Push and hold the microphone button for 3 seconds to unmute.
If Alexa is not responding to your voice commands, the likely cause is that the microphone is muted on the speaker.
- Push and hold the microphone button for 3 seconds. 
- The LED indicators on the front turns off to indicate that the microphone is unmuted. 
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