Introduction
Prerequisite only guide for disconnecting display cables on a 21.5" Retina 4K Late 2015 iMac.
What you need
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Hold the display with one hand while using your other hand to unplug the display power cable.
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Continuing to support the display with one hand, flip up the metal retaining bracket on the display data cable.
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Carefully pull the display data cable from its socket on the logic board.
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