You missed the chance to get it replaced for free from nvidia. Im guessing that your DV9000 is part of the Nvidia Lawsuit? the one that the graphics cards overheated in the laptops and caused problems. http
/www.nvidiasettlement.com/
The period is already over and done with, I would complain to HP but chances are you missed the boat. After the warranty period is up you really cant do anything because their liability is gone. Unless you have state laws that say otherwise such as Wisconsins Lemon Law that states if you have something that breaks 3 times after a warranty fixes it you can return it for a new one or a different one of equal value.
I would look into your model number with the nvidia lawsuit, if it is and you try to request a lawsuit chances are it will get thrown out because they already solved this issue with amble time.