I have used this samsung LD190G as an external display with my 18 month old macbook pro 13" successfully for quite a while. Now it pushes the screen to the left and I can't see my Apple menu anymore. I tried to take a screenshot but it shows the screen properly so I attached this mock version screenshot. There are no controls on the monitor to change its position and the resolution is just fine. The mouse will not go into the black area on the right, but will go beyond the edge of what I see as if the screen is over there. Any suggestions?