Hi Lolo, the Auto Power Down Function will automatically turn off the unit in D.IN / HDMI / and BT mode if there is no audio signal for 18 minutes. If your soundbar is turning off unexpectedly while content is playing, please reach out to Samsung Support so we can further identify the issue and provide troubleshooting steps. You can reach us at: 1-800-SAMSUNG (ask for TVs), available 8AM - 12AM EST, 7 days a week, or Chat with us on Samsung.com: https://www.samsung.com/us/support/contact/
^Tim