Volume of the Soundbar suddenly turns up, or it does not turn off by pressing the power button

IMPORTANT: This article applies only to specific products and/or operating systems. Check Applicable Products and Categories for details.

Your Soundbar may be in DEMO mode. 

• To cancel the DEMO mode, reset the Soundbar. Refer to the article: How to reset the Soundbar.
• For HT- CT390, HT-CT790, HT-NT5, HT-RT3, and HT-XT2, refer to the article: DEMO appears on the display window of the unit and the Power or HOME buttons do not work.