Bbdumpkin64, For optimal performance, we ask that you please ensure you've got the latest firmware version installed on your DU6900 TV. You can check this by going to Home > Menu > Settings > Support > Software Update. You may also want to further optimize performance with the self-diagnostic tool, which checks memory, frees up unused cached memory, and closes background apps. Go to: Home > Menu > Settings > Support > Device Care > Start Device Care. I also have a few recommendations that may improve your visual experience: Go to Home > Settings > All Settings > Picture > Picture Mode and select the mode that best fits your usage: 1) Standard: Default mode suitable for general viewing environments. 2) Natural: Reduces eye strain for a comfortable viewing experience. 3) Movie: Most suitable for watching TV or movies in a dark room. 4) Dynamic: Makes the picture brighter and clearer in bright viewing environments. 5) Filmmaker Mode: You can watch the source content (e.g., movie) as it is. If the image is defined as Filmmaker Mode, it will automatically switch to Filmmaker Mode while watching. You can also go to Settings > All Settings> Picture > Expert Settings > to manually fine-tune your image. If you need more help, Samsung is here for you. Call us at 1-800-SAMSUNG, 8 AM - 12 AM EST, seven days a week. Our LiveChat agents are also available by clicking on the ‘Support’ link on our website. ~ Samsung Pro

Hello, Thank you for purchasing the Samsung DU6900 TV and for sharing your experience with your TV not displaying properly. Please try the following troubleshooting steps: 1. If any external devices are connected, check all input cable connections 2. If the issue persists, define precisely what is wrong with the display. For example, mosaics and blocks, multiple lines or white dots, and fixed horizontal or vertical lines. 3. Try changing channels using the remote control. Is the issue the same on all channels? 4. Press the Home button (looks like a house), select Source, and choose another input source. Is the issue the same on all sources? 5. If the same problem persists, run a diagnostic test. (Home > Settings > Support > Device Care > Self Diagnosis > Picture Test) 6. If the problem disappears during the test, check your TV signal (Home > Settings > Support > Device Care > Self Diagnosis > Signal Information) to check the signal strength. The signal strength must be more than 20 dB (more than 4 bars on the icon) for stable signal reception Should your issue persist, please contact Samsung Customer Support. You can call us at 1-800-SAMSUNG, 8 AM - 12 AM EST, seven days a week. Our LiveChat agents are also available by clicking on the ‘Support’ link on our website. ~ Samsung Pro