On my TV the guide takes an excessive amount of time to load. The video preview is often times has the circle icon for loading the preview. When you start to scroll down to view the guide it will take you back to the original channel the TV is currently on and you have to start scrolling down all over again. Then the process repeats. I'm using an over the AIR antenna and the reception is fine. I also have the latest firmware update. My other 65" Samsung in the house loads up immediately and there are no issues. Not sure why the lag? It has done this ever since I've had the TV.
