Einleitung
Internal prerequisite.
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            Gently pull the cable retainer on the optical drive cable ZIF socket toward the right side of the iMac. 
 
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            Pull the optical drive ribbon cable out of its socket, being careful not to rip it in the process. 
 
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            Pull the optical drive thermal sensor connector toward the right side of the iMac to disconnect it from the logic board. 
 
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            Peel off the strip of EMI tape attaching the right side of the optical drive to the rear case. 
 
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            Push down on the optical drive bracket retaining clip while pulling the top edge of the optical drive away from the rear case. 
 
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            Rotate the optical drive slightly toward the bottom edge of the iMac while pulling it away from the rear case to release the lower retaining clip. 
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            Pull the optical drive away from the right side of the rear case and remove it from the iMac. 
 
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To reassemble your device, follow these instructions in reverse order.