Paul B: I am sorry that you are experiencing issues with your TU7000 4K Smart TV. Your TV has several self-diagnosis tools built in that can help solve problems with signal, network, picture, or sound. Go to Settings > Support> Device Care > Start Device Care You may also want to clear out your TV's temporary storage space by pressing and holding the Power button for 6 seconds until your TV turns off and back on again. Please also be sure you are running the latest firmware. You can check to see what software version your TV is using and if there is an available update through the settings on your TV. Go to: Settings > Support > Software Update. (1420.0 released on 1/5/21) I hope this helps. Should you need further assistance, please contact Samsung Customer Support. 1-800-SAMSUNG (ask for TVs), available 8AM -12AM EST, 7 days a week Or visit us on the Samsung website and click on the ‘Support’ link in the upper right corner of the homepage for: 1) Contact Us Options (LiveChat, Remote Support, Facebook, Twitter) 2) Product Support 3) Manuals and Downloads 4) Warranty Info 5) Product Registration: Registering your product gives you access to easy warranty support, convenient opt-in to special promos and offers, faster troubleshooting and service, and quick notification of system updates 6) Samsung Community: A great resource for getting help from Samsung moderators and customers and more 7) …and more product, repair, order, and care options ~ Samsung Solutions