iMac Intel 20" EMC 2105 and 2118 Logic Board Replacement

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Disconnect the following connectors from the logic board:
Camera/IR board cable.
Optical drive fan.
When removing the optical drive fan connector, it is helpful to use a spudger or your fingernails to push the ears on either side of the connector toward the top edge of the iMac.
To aid in removing the camera/IR board connector, it is helpful to use one hand to pinch the cables against a spudger and pull up toward the top edge of the iMac while pulling up gently on the cables with your other hand.

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