is the video card that is sending faulty signals? or is it the monitor. The monitor is a Mag MXP17F about 6 years old. Any thoughts? Is there someway I can definitely confirm that the monitor is faulty or the videocard. Can I focus the monitor? -walter ps. No it is not by eyes. The monitors I use at work are much clearer and no it is not the Vert refresh rate, it is 100Hz.