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iMac Intel 27" EMC 2546 Heat Sink Replacement

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Remove the four 7.5 mm T8 screws from behind the GPU on the logic board.

These screws are set inside large, spring-loaded Phillips #2 screws. To prevent the larger screws from spinning when you loosen the T8 screws, hold them with a fingertip or Phillips #2 screwdriver.

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