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Lift the logic board off the heat sinks.

If a heat sink seems to be stuck, carefully pry it away from the logic board to separate the solidified thermal paste.

If you need to mount the heat sink back into the iMac, we have a thermal paste guide that makes replacing the thermal compound easy.

During reinstallation it is helpful to install the heat sinks one at a time, starting with the one closest to the logic board.

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