|riider is right, it might not be the board, many make assumptions without enough hard facts.|
Note that you can download the repair instruction papers from HP and they include the exact model numbers.
IF you do purchase components from ebay, make sure 1- The seller has 98% or better satisfaction rating. 2- You read carefully whether the part is 'new', 'like new', 'pulled from a working machine', is 'original HP part', 'equivalent replacement', or 'replacement part from original supplier', plus is Tested, and Guaranteed.
You have to be a little bit crazy to keep you from going insane.