line on monitors...HELP

[deerslayer]

I finally got my dual monitor setup to work, there was a setting in bios i finally found but now i have a barely visible grey bar going down my primary screen and one going up my secondary screen, anyone know why this is?

 

[Gosharkss]

Monitors use Electro magnetic field to deflect the electron beam across the screen. Thus monitors are very susceptible to external magnetic fields even those created by another monitor close by. Put two monitors side by side and hit the degauss button on one of them, you will see what I?m talking about immediately.

In dual monitor application where monitors are set up side by side, there is a very good possibility that there magnetic fields will interact and cause rolling gray bars like you describe, jitter or other annoying artifacts on both screens. Short of moving the monitors away from each other (Limiting the benefits of using a dual head video card) there is no way to insulate or shield the monitors to eliminate this phenomena. To reduce this problem I recommend that the same monitor make and model be used in dual head applications. Monitors of the same make and model are less likely to interact with each other and are more likely to produce matching colors.

The interaction between the two monitors is mostly due to the magnetic fields fluctuating at different or out of sync frequencies. This is the same phenomenon you see when you look at a computer monitor on a television. In order to reduce this problem I recommend that both monitors be run at the same resolution and refresh rate.