|Did you determine whether the AC adapter and it's cord, and the jack in the computer are okay? |
Other things could be wrong.
You could check out the hard drive.
You can hook up the hard drive to another computer by buying and using an inexpensive adapter to connect it to a desktop computer, or you can install it in a external drive enclosure and connect it to another computer, just don't boot from your drive on the other computer - it's normal for XP to refuse to load Windows all the way if the mboard on the other computer is more than a little different when you boot from it. You just want to determine whether the drive works okay and still has your personal data on it.
If you're NOT sure what's wrong, take it to a local place that repairs laptops and has laptop parts to have them analyze it.
The main battery.
and type in the p/n number to search with, the part before #, to find the HP part number for your laptop main battery.
Once you know that part number, you don't have to buy it from the HP web site - you can probably buy it locally from places that have laptop parts. It doesn't have to be a HP battery - it can be any battery that is compatible with the HP part number, or with using it in your specific dv2xxx model that's on the label on the laptop. All these batteries are made in China these days, so as long as the battery has a one year warranty, that's the same as the warranty you get with the HP battery anyway.