If you don't hear sound when playing a YouTube video, try these troubleshooting steps:
- Adjust the volume control on your computer and speakers.
- Adjust the volume control located in the lower left-hand corner of the YouTube Video Player.
- Restart your browser.
- Try turning up the volume for other video players (like Quicktime, Real Player or Windows Media player).
If you still have no sound after completing the steps above, these additional tips may help: