How to Fix No Sound on the Skywave X40 Subwoofer？

1. Check that the subwoofer power cable is properly connected and ensure the subwoofer indicator light is functioning normally.
2. Confirm whether the subwoofer indicator light is steady. A steady light indicates a normal connection with the main unit. If the light is blinking, follow the steps below to re-pair:
   a. Press and hold the subwoofer button for more than 5 seconds until it enters fast-blinking pairing mode, then release.
   b. Facing the main unit display, press and hold the “Xupmix” button on the remote for more than 5 seconds until the main unit displays “SUB” to enter pairing mode.
   c. Once pairing is successful, the subwoofer indicator light will remain steady.
3. Power off and restart, or perform a factory reset.

If you need further assistance, please contact support@ultimea.com, and we will service you ASAP!