I believe the bios on my hp pavilion dv9000 is having problems. the problem i have is that the time and date are always wrong. is there any way i can fix this myself?

It is possible the internal system battery is dead.
Replacement battery for your model can be found here
They can be replaced yourself if you are comfortable entering the innards of your laptop?!

Hi Rmellon,

I understand that your PC time and dates keeps changing. I suspect the issue is due to the CMOS battery. I suggest you to change the battery. It will not cost you much. I have included the link which clearly shows a video on how to change the real-time clock battery. Please getin touch with me if you need clarification. It is specific to your dv9000 model.

Steps for Removing and Replacing the Real-Time Clock Battery:-
Click Here
or
http://h10025.www1.hp.com/ewfrf/wc/document?lc=en&cc=us&lang=en&rule=17510&product=1842189&dlc=en&docname=c00815051

I am pretty sure it is due to the CMOS. Let me know whether it fixes your issue. If you don't wish to do the above you could also try the following

http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&docname=bph04397&dlc=en&lc=en&jumpid=reg_R1002_USEN

Let me knwo the response you get.

Thanks & Regards
Rajesh