Answer to: need to buy logic boardAs long as your changing the Logic board why not upgrade to the 2.13GHz board. Mid 2009. they are interchangeable. This will give you a better computer when your done. Make your money count. I would look on Ebay for a logic board. Be sure it is fully tested as working before buying one. As alot of people tend to sell off the old Ones they took out of their computer that were No good. Cost should not be over $225. plenty of guides online as to how to install these. Hope this helps.