If you have no audio from your connected Aux device, try the following steps to resolve this issue:
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
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.