A friend recently gave me his 2008 MacBook Pro because its logic board died. I discovered online that many people had some success in reviving a dead logic board by baking it in an oven. I tried that. It worked.
Update (1 June 2015)
The laptop has died. I read online that the baking procedure only revives the computer for a few months. In my case, it lasted 2.5 months. It’s not worth all the trouble, so to the e-waste warehouse it goes.