17" LCD monitor has display noise in grayscale/midtone colored data. Saturated R,G,B, white or black is clear. Noise is like analog waves going down display. At 1024X768, 60Hz refresh rate, the waves are ~80HZ (each takes about three seconds to traverse screen top to bottom). No adjustment gets rid of it completely. Brightness, contrast has no effect. Less noticeable at higher refresh rates. ...