3 pixel color changing line at the bottom of the screen

Ithilion

Distinguished
Sep 18, 2011
12
0
18,510
Hello, i'm on a 250 gts and i'm using a samsung le19a656a1d (1440x900).
My problem is i have this 3px line at the bottom of the screen that keeps changing color whenever i change monitor source or turn monitor off/on. The line is not present at pc startup but it appears when desktop loads
Thanks in advance for any support and sorry for my english.
 

Ithilion

Distinguished
Sep 18, 2011
12
0
18,510
I forgot to mention i'm using a dvi->hdmi cable (dvi at graphic card, hdmi at monitor), and that the line does not appear on any other source (tv)