Eva

My model is the three. There is two knobs in this speaker one that regards the volume, and the other which regards the connection (aux,Bluetooth,usb,phono, or WiFi). The volume knob works just fine, but a month ago the connection one stopped working. It’s stuck on the aux connection, since the knob no longer works. When the knob is turned, the available connection doesn’t change. How can I fix it?