Hi Robusto, I would start by clicking -Home -Picture - Expert Settings -Reset Picture. If there is still an issue please reach out to Samsung TV Support at: ― 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. Thanks, ^Scott