Hi
How did you dim your screen?
Using the knobs on the monitor or through the software?
The software that is associated with your video card probably has a set of tools for making adjustments in the computer.
Brightness, contrast, saturation, and color balance should all be adjustable.
There is also a set of tools in Windows, go to Display, and click on Calibrate Color.
I can adjust mine to the point that you can hardly see it.
What kind of video card do you have?
Mike