I know someone who had same issue.

http://www.youtube.com/watch?v=bnkQNmKauEc

HP DV9000 blank screen fix! Video problem BGA rework
This fix also works on the HP DV2000, DV6000 and DV9000 there are a couple more HP’s with this BGA video issue. Also effected by this issue are a couple Compaq models. The Comaq Presario V3000 V6000 and a couple of the Pavilion models.
If you would like us to fix this issue for you please send the laptop to the address below
Reboot IT LLC
211 John Young Parkway
Kissimmee FL. 34741
If you have any questions please call our service hotline 321-332-0710
We never charge bench fees to give you a quote!
Remember some motherboards are beyond repair and we will have to replace the motherboard. We will give you a FREE quote and its up to you if you want to repair the laptop. If you dont want us to fix the laptop just pay the return shipping.
Thank and I hope you enjoyed the video!
-Pete
Rebootit.biz
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Mixcat.com HP Compaq Laptop notebook BGA video Rework