New Monitor Vertical Line on Black Screen

[hclix81]

I just got a 19" betson imperial monitor to replace another monitor I was having issues with.  The monitor is brand new but I'm getting a single vertical line on the right hand side of the screen.  I'm using an arcadevga card in my setup.  The weird thing is the line only shows up when the screen is black.  Also, if I drag a window towards the top of the screen that has color the line disappears.  Any idea what is causing this or how to fix it? 

This is my third monitor I've worked with.  The first one came with the machine but had a vertical size issue, the second one was the one this was replaced by and the red color was out of it.  This one looks great except for the line,  with games that take up the screen with no black everything is perfect, but on donkey kong or pacman with the background being black the line appears.  Another thing to note if I hook up my spider-man jamma board there is no line when the screen turns black.  Any help would be much appreciated.  I can take pics if needed.

[hclix81]

I didn't get around to taking a picture but I've recreated what this looks like while I sit here at work.  If I turn the contrast down the line also goes away.  And you can see as the monitor brighten towards the top when I drag a colored window that the line fades and then finally disappears.  Any help would be great.

[grantspain]

its not a monitor fault,its something to do with your graphics card