Chrisea: I seems it may be related to the ACPI (power section) of the unit. This too is one of the common problems with the DV2k,6k,9k and CPQ V3000/6000 series. Along with the No Video and WiFi. What I can tell you is that it is related to the nVidia chipset. I am not sure if on the Graphics or the PCI chipset, because the last time I solved it (or thought) I had reflowed both BGA chips. Rather than doing one, testing then doing the other. Speed was of essence in getting that unit out. It came back, with WIFI shutting off, and Sleep/Wake/Hibernate issue.

New posts are added regularly for HP Boot Problems because it seems to be a pretty widespread problem. I am using a bypass to get around the problem and this may work for others as well.

In the end I think that I have the same problem that many other people have with HP Laptops not booting. It is claimed that it is caused by a problem with the NVIDIA chip and there is even a class-action suit being assembled for it. I thought that the seating of the hard drive was part of the problem but now I don't think it played any significant part in it.

I am still using my machine because I was able to find a bypass. I documented my experience and the bypass on my site. Click here to see it.

Note: I originally posted this problem in the Windows Vista forum so I posted this final comment on both.

That is also one of the issues related to the DV Series. Since many of the components are on a VLSI circuit many sections can fail. The failed video on a number of DV Series is related to the nVidia Video controller. The failed SATA and Network is related to the nVidia PCI Controller.

I had some free time last weekend and removed a BGA nVidia video chip. And what I found is that the chip itself has oxidation on the connectors (BGA Solderball pads) This is usually caused by:
1: poor packaging leaving the factory. Salt air or just plain air is oxidizing on the pads.
2: poor temperature controls during the manufacturing process. Uneven heat on standard chips, and uneven pressure on BGA.

My suggestion to nVidia is to pack those chips leaving the factory in nitrogen sealed boxes. Before transporting them from Malaysia to China or Taiwan where most of the HannStar motherboards are fabricated.

A BGA reflow can correct most of the PCI or Video Controller issues

As I know, HP Pavilion DV9000 Battery (Notebook Battery) can compatible with HP DV9000 DV9100 DV9500 432974-001 EV087AA