Troubleshooting: Alexa not responding
Short answer
Push and hold the microphone button on top of the speaker for 2 seconds, until the LED indicators changes from red to off.
If Amazon 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 2 seconds.
The LED indicators on the front turn off to indicate that the microphone is unmuted.