Hi,
I have a 19" monitor, mounted horizontal. Recently I noticed that the picture in the monitor is not quite horizontal. I mean that the bottom left corner of the picture is a little higher than the bottom right corner. for the top corners it is the same. I checked whether my monitor is mounted horizontal, and it is. I tried the horizontal and vertical adjustment knobs, but that only changed the size and the position of the image, not the rotation. What could be the problem?