My sister gave me her old macbook when she got a new one. I had an identical one that wasnt working right so i got rid of it and was excited to get a new working computer. Well it didnt quite work. the power cord was dead and after playing around with it i found it to be unfixable, so replaced the power cord. Once that was out of the way i found the battery was dead and wouldnt charge, just like my old mac book, and my old ibook, and my ipod, and like is starting to happen to my iphone. So i replaced the battery, it didnt work at first but i found that the problem was the battery wasnt sitting in the case correctly because the case is cracked in multiple places, just like happened with my last macbook. Notice a trend? well now apple products make great gifts, however i certainly would not advocate giving them half a penny of my own money for their garbage gear. the only reason anyone would have any reason to purchase one aside from being trendy is the reliability and stability of OSX, which aside from their poorly made hardware i must give credit where credit is due. ok now that my rant is over, ill return to my tale of fixing the macbook, which worked perfect for about two days after the new battery and then i found myself unable to type or use the mouse. Frustrated i set it aside for a couple weeks. One weekend i found myself unusually motivated and decided to crack it open and see if i could remedy the problem. I would suggest you visit http://www.ifixit.com/Device/Mac (great resource) and walk yourself through the steps before attempting to crack it open.
i watched a youtube video on the proper way to open it up but found that the steps they took to open the laptop didnt work out so well when i tried to follow them. so i would suggest to start by removing the screws inside the battery space and work your way around. Youll need just a regular small phillips head screwdriver but you also may need a torx set depending on the model mac you own. I would say that if you dont have a set you should pick one up along with a tri-wing screwdriver. I found my set at Frys.com They dont cost much and if you plan on doing any future electronic repairs they are a gift from the tech gods to have laying around. ::IMPORTANT:: you MUST keep track of the order you removed the screws and seperate them from each other. I kept a notepad and just wrote down where i removed the screws from and folded them into the bottom of the paper. Trust me i got a few mixed up and it was a nightmare to get them back in the right spots. inside the battery case remove the screws from the side facing the screen. remove the bezel and any remaining screws.