I see you did the monitor steps and yes i would have to agree that it is most likely the video on the laptop or the screen itself.
The probability is equal to which one it is.
What is the make and model of your laptop? Is it a HP laptop?
If so go HERE
for a driver from HP themselves for that model video.
Edited by rshaffer61, 22 February 2010 - 07:35 PM.