Over in the laptop troubleshooting forum we know that this is a sign but your post omitted if it was some dv6000/dv9000 or the other dozen model numbers.
Please save yourself some dozen posts and get those make and model numbers in your posts.
I pulled an old laptop off the shelf recently and got it running. I can see lines across the screen and they bounce up and down in several spots. I did a dead pixel check and that seems okay, could it be the video card?