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Hello , i have an macbook unibody a1278 . Last day i have press the power button it didnt work, i thought the problem is in power cord, than i took my brothers power cord adapter i tested it didnt work again. I took my battery out from my macbook tested again it didnt work again. I asked a friend of mine about this issue he said that it could be a problem in motherboard or magsafe board. Can you please help me with it ?