Hi Andrew: Here is what I would look for and try to adjust --- Horizontal frequency. This sounds like it is some multiple of the desired (for the monitor) rate. That's what's getting the multiple images across the width of the screen. Also (maybe first, but definitely in conjunction with the above) look for 'Vertical' frequency/lock. This one is what is getting you multiple images in the vertical direction. Memory says that the adjustment is "roll down (image) and just return the adjustment the other direction till it locks in place." The 'horizontal lock' is a much courser adjustment. (This is all standard TV/Monitor adjustment stuff. If anyone has any specific advice different from this, by all means, give it a try.)