Try these solutions:
1. Ensure that the Bluetooth source has been selected and the AXR is in ‘Pairing’ mode
Press the Bluetooth/Phono button on the front panel or the Bluetooth button on the remote.
"PAIRING" will show on the display.
2. Ensure that your Bluetooth device is in pairing mode and not already connected to another Bluetooth unit
3. Forget the AXR from your devices’ list of discoverable Bluetooth items and start the pairing process again
4. Perform a factory reset on the AXR