I have also a pv2000 with the same problem. I recently discovered the issue is not new to hp laptop owners. the problem is aparenly unsolved or keept secret by HP. It must be the BIOS chip/program that is purposly design to force the users to purchase the HP extended waranty. Why don't you try to see what HP service said about this?
They need extra charges like with the HP injet printers cardriges.
This is my point of view.