I am not sure if this is an issue. I arrived in my hotel room last night from the airport, took out the camera, go to live view, and took a shot of the room. I don't recall these bars being there before, just the black borders on the top and bottom when in live view. When I uploaded the pictures into Lightroom, the bars disappeared. I played a sample video recorded and the bars don't seem to be there. No bars if I take a picture in the room and don't use live view. I have a 5D Mark III and have 70-200mm f4 L IS and 24-105mm f4 L. Both lens have these bars. Any help is greatly appreciate it. Thanks.
P.S. I have not tried using my camera in different lighting condition (i.e. outside) because I'm in a meeting all day long today.