Pull out the troubleshooting manual offered by the manufacturer and try the steps it suggests. If there is no manual, start with basic steps and work your way up.Make sure the desktop speaker is plugged into a power source (some are powered through the PC, while others must be plugged into an outlet) and that it’s powered on.Reboot your computer.If there’s still no sound, open the audio settings provided by your computer’s operating system and select the troubleshooting option. Follow the recommended steps.If none of this works, check the manufacturer’s website for troubleshooting instructions or contact information. You may also find useful advice on audio forums from other users who have experienced the same problem.