External monitor showing greenish shadow I've got a macbook pro 2011 and am using a mini-display to dvi adapter to hook up a ViewSonic monitor (Viewsonic VX2450WM-LED 24-Inch).  Problem is this greenish shadow showing up for certain hues of white, I'm not sure what it is or how to fix it.  

I've tried multiple mini display to dvi adapters and DVI cables with no change.  As far as I know DVI is the best I can do on this monitor, and I've tried all the display color settings possible (including calibrating) and nothing gets rid of the hue.
Any idea what causes this?
Determining the cause of display issues is generally a basic troubleshooting task, performing substitution on components until the faulty component is determined:


replace cables (you've already done this)
use the monitor on a different computer
use a different monitor on the same computer


In this case, you've used a different monitor on the same machine and found that when using the same cables, the different monitor is not showing the color changes, therefore the monitor has the issue.