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オリジナル投稿者: Dan ,


Sounds like you have a cold solder joint on the South Bridge interface chip.

Do you or a friend have the needed equipment to handle SMT components? If you do you could try re-floating it. This is a very advanced project and may fail.

Otherwise, sorry to say I would try to get your money back, or look into getting a new logic board.

Apple no longer services this model, but some authorized service centers still do (and may even have the needed parts in hand).