ghost lines

my screen is displaying ghosted-like horizontal lines, I've tried another monitor to check if it was a monitor problem and the lines remain ...and now I'm considering replacing the video vard, what do you all think could be causing this?
Tom

type dxdiag in the run box this will test you graphics..and try this to see if it find more on whats happening>http://www.webattack.com/get/aida32.shtml

Did you change your Video settings before this problem occured?

What videocard do you own?