Check to see if the sound is muted on your computer. In the bottom right corner if you see this icon: The sound on your computer is muted. Click the icon and unmute the speakers.
The volume on the computer may need to be turned up. Click on that same icon noted above and adjust the volume. Note: You should NEVER have to adjust the volume on the speaker(s) attached to the Starboard.
Is the sound cable plugged in at the wall and on the computer?