Hello,
Several important things to mention...
...Then they tried to get her to buy some kind of warranty package or something like that, she didn't. When HP knew she wasn't going to buy anything, the guy on the phone said this conversation has to end. Man, HP support sucks...
For out of warranty HP notebooks,
it is usually cheaper and more cost-effective to purchase an HP post-warranty care pack to repair a faulty notebook. A post-warranty care pack provides extended warranty after the base warranty has expired.
For example, when my the BIOS of my HP nx7300 Business Notebook corrupted after the warranty had expired, I had three options. Option 1 was to get HP to do an out of warranty repair, which would have cost £250 (about $360) not including servicing costs. Alternatively, option 2 was purchase the motherboard for £250 and repair it myself. What I did instead, and what made more sense, was option 3, where I purchased an HP 1yr post-warranty care pack for just £70. This also saved me the hassle since all I needed to do was send it to HP for servicing.
After searching to see if a post-warranty care pack was available for dv2000 series notebooks, I couldn't find one (you can see the list of available
HP care packs and prices for this month). Still, you mentioned that HP support offered warranty packages and HP may offer post-warranty care packs at their own will. You didn't say whether they mentioned the cost, and if they did, how much the warranty package would cost. I strongly advise that you call HP support and find out whether there are any available post-warranty packages for your HP notebook, and if so, how much it will cost. It could save you a lot of money, not to mention time and hassle.
She knows it is the motherboard because two different people told her this...
Secondly, I know you're certain that the problem is the motherboard, but you need to be doubly sure if you choose to buy a replacement motherboard and repair it yourself, because laptop motherboards are very expensive (and you don't want to replace a part which doesn't need placing). You mentioned two people told her the motherboard needs replacing. Any ideas as to who and how they made the conclusion?
If you choose to repair it yourself (which I advise against for the reason I gave earlier) then I suggest you send the notebook to HP and get them to do a
diagnostics check (at a cost for out of warranty notebooks) on the laptop to establish what the actual problem is. You can then be certain that you're replacing the right part(s).
...Does it have to be the exact same motherboard as it has right now or as long as it says it's for a dv2000, it will work?...
HP notebooks have service tags on the underside which tell you the product number. Use the
HP Parts Store to find the correct replacement part (and it's part number) for your particular notebook model. Enter the product number in the 'Search by model number' search field. If the part is in stock, you'll be able to see how much it will cost to purchase from HP. Still, it would be wise to search ebay or froogle using the part number to see if you can get it cheaper elsewhere.