Michelle, tThe symptoms you describe may indicate a failure of the Nvidia graphics card (a known and increasing problem). CNET says: "Two ways that failures manifest themselves are not being able to start the computer and, of course, a blank screen. " among others. Here is a link to more on the Nvidia problem:
http://www.theinquirer.net/inquire [...] 84-g86-bad
Good luck, many others (including myself I fear) are in your position.
You can of course try some other things first. Because this model also has an overheating issue ,open your system clean the fan and heatsink,some good instructions ans explanations are here http://en.kioskea.net/faq/7853-my-laptop-is-overheating-what-can-be-done and here http://en.kioskea.net/faq/6492-how-to-fix-your-dv6000-dv9000-dv2000-overheating-issues. Here is a great link with regards to recalls etc. of this particular computer. Honestly, I hope it is not and may just be a bad battery that you should check as well. Let us know how it is working out. Just my 2cents....hope I
I am wrong :)