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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• Remove the bracket from behind the GPU heat sink.
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• Remove four black stickers from the back of the CPU heat sink.
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• Remove four 12.3 mm T10 screws from the back of the CPU heat sink.
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• Remove the spring plate from behind the CPU heat sink.
• Lift and remove the backing plate from behind the CPU heat sink. The backing plate has two posts that fit into alignment holes in the logic board.
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• Lift the heat sink up from the logic board.
• The CPU will most likely stick to the heat sink, so be careful about where you put it down.
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