With the monitor set to 4:3, you will always have black bars on the left and right. This would be normal. A true 4:3 source program would fill the height, but still have the side bars. The 16:9 setting for the TV monitor should be the correct setting to fill to the sides. You would have black bars on top and bottom to fill in the difference from the 1.78 to 2.35 ratio of the film. It "shouldn't" look stretched at that setting, but I can't explain if you are seeing different. ?

-Dave

M80s VP150 QS8s EP500s
ravenmanor.com/cinema/