Check the power source and make sure the speaker is charged or plugged in
Turn the volume up on both the speaker and the connected device
Make sure the speaker is turned on
Disconnect and reconnect the audio cable or Bluetooth connection
Try a different cable, port, or device
Restart the speaker and the connected device
Remove the speaker from Bluetooth settings and pair it again
Check that the correct output device is selected
Inspect the speaker for visible damage
Clean the charging port, audio jack, and speaker grille
Reset the speaker to factory settings
Update the speaker firmware if available
Test the speaker with another device
Move the speaker away from interference or obstacles
Contact the manufacturer or a repair technician if it still does not work