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Step 17
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Lift the heat sink up off the logic board.
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Be mindful of the microphone cable when lifting the heat sink, as it can get tangled on the top edge of the fan.
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When you mount the heat sink back onto the logic board, be sure to apply a new layer of thermal paste. We have a guide that makes replacing the thermal paste easy.
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Step 18
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Fan
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If you have the A1304 version of MacBook Air, the fan is a separate component. The following steps therefore do not apply to your model. Simply detach the microphone cable from where it is adhered to the fan, and lift the fan out from the machine at this point.
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Remove the four 2.5 mm Phillips screws securing the fan to the heat sink assembly.
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