Which motherboard do I buy to replace my broken one?

I have a DV9000, 17inch. A number (that I think is significant) 439112-001 is on the bottom of the laptop.

I need to buy a refurbished/spare part motherboard to replace the one that died in my other computer, but I can't figure out which one to buy. At first I thought it was as simple as buying a used DV9000 laptop or motherboard, but apparently not only does the screen size (13 vs 19 inch) matter, but also a number.

I see numbers on ebay with stuff like "447983-001"--that's why I thought that one number on the bottom of mine was important. But I can't find that number on any motherboard on ebay, and it only turns up 300 pages on google, which leads me to believe it isn't the right number.

So, how do I determine what motherboard to buy?

 

dig out a service manual for the dv9000 and look it up.

the manuals are commonly available here and/or via google

 

Thanks for the info! I think I understand what you are saying, but when I have the manual up I can't find anything called "mother board" or even "video card"? Is there another name for it?

I'm using this: http://h10032.www1.hp.com/ctg/Manual/c01311536.pdf

 

Page 5-75 of the manual. It's called a system board.

You can find it in HP parts. They also have a program where you buy the board at a discounted price and return to them in a postage paid box, the old defective board.