Hello, this can be caused by many issues, most often a compromised Optical cable. If changing that out doesn't work feel free to call us so we can troubleshoot with you. • Phone: 1-800-SAMSUNG / Available 8 AM - 9 PM EST, Mon - Fri
• LiveChat or Email: https://www.samsung.com/us/support/#contact_us_for_support
We look forward to hearing from you.
^Scott