HP Pavilion ZD7000 Fans Replacement

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Disconnect the upper fan connector from the motherboard.
Remove the four spring loaded screws holding the heat sink assembly to the motherboard.
When reassembling, ensure that all the screws are equally tightened: thread all screws one turn, then add one turn to each screw in the following order: top left, bottom right, bottom left, top right. Repeat this order until the assembly is firmly seated.

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