No audio from connected Aux device

Make sure the Aux input source is selected. Press the speaker's Aux button. When pressed, the light above the button lights to indicate it is selected

Make sure the connected device is on and playing

Turn up the volume on the connected device. Set it to 90% and use the Bose® speaker volume controls to adjust the level

Make sure the 3.5 mm cable is securely connected to both the speaker and the connected audio device

Make sure the speaker is not muted. When the speaker's Aux source is selected, holding the multi-function button will mute and unmute the speaker

Increase the speaker volume

Try connecting the device with a different Aux cable

Try connecting another source to determine if the issue is specific to a particular device

Reset the speaker by turning it on and holding the power button for ten seconds. (Note: A reset clears paired mobile devices and language settings from the speaker and returns it to original factory settings.)