What should I do if adjusting settings doesn't fix the blurry screen?

First, ensure all cables connected to your TV are secure and in good condition, as loose or damaged cables can cause signal issues. Then update your TV firmware by going to MENU > Support > Software Update > Update Now while connected to the internet. If problems persist, reset your picture settings to default through MENU > Picture > Reset Picture, and contact Samsung Support if the issue remains. [Page 1]