Two or three faint horizontal lines appear across the desktop. They are most noticeable on a light colored background.
This is due to the design of the CRT monitor. Some monitors use a technology called "Aperture Grille." This monitor design use horizontal tensioning wires that cause a faint shadow on the monitor image. This technology is often branded as Sony* Trinitron*, Mitsubishi* Diamondscan*, or ViewSonic* SonicTron*.
The more common "INVAR Shadow Mask" and LCD monitor technologies do not have these tensioning wires.
Adjusting the contrast of the monitor may minimize the appearance of the lines. This issue is not a problem with the graphics controller.
This applies to: