I'm guessing that I may have an idea about the graininess you are speaking of. Although depending on the media source you are speaking of, it could me a matter or video resolution, however assuming this is not the case, I have noticed a graininess of a sort that I did not see with another 23" LCD/LED (AOC), when compared to this 23" Samsung. I'm not sure how this occurs technically, but it seems that the video almost has a random "pixelization" like the grain from films pre-digital. I'm not sure what this is about, but video on the screen looks stellar compared to the AOC (not saying much), and compared to other NEC and Samung LCD (Non LED) monitors that I've owned. Guess that doesnt answer anything for ya, but perhaps we are in are in agreement that we are seeing the same thing....?