Restart the sound bar and try pairing again. You have not enabled the Bluetooth function of the device; see the user manual of the device on how to enable the function and correctly connected the device. The sound bar is already connected with another Bluetooth device. Disconnect the connected device, and then try again.

Select Bluetooth as the input source.

Un-pair the Bluetooth device that is currently connected and pair with the desired Bluetooth device.

Move the Bluetooth device closer to this unit.

Do not use this unit near devices that emit electromagnetic waves.

Use a Bluetooth device that supports the protocol.

Delete the connection profile in the Bluetooth device and then connect the Bluetooth device to this unit.