Introduction
Use this guide to replace your CR2032 PRAM battery.
What you need
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Lay the iMac display-side down on a flat surface (putting a cloth under the screen to protect it from bumps).
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Loosen the three Phillips screws securing the rear panel to the iMac.
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Lift the rear panel slightly near the bottom of the iMac.
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Pull the rear panel toward yourself and remove it from the iMac.
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Lift the AirPort card slightly by its plastic tab and pull it straight away from its socket.
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Insert the flat end of a spudger between the body of the AirPort card and its antenna connector.
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Push the spudger away from the AirPort card to disconnect the AirPort antenna.
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Remove the two 5.5 mm T6 Torx screws securing the AirPort bracket to the logic board.
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Slightly lift the AirPort bracket off the logic board.
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De-route the AirPort antenna through the slot in the AirPort bracket.
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