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Convert an iMac Intel 27" EMC 2639 into an HDMI Monitor

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Connect controller to backlight

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For the backlight, a 4-pin cable went to the board.

On the other end, the controller cable had 8 pins for 6 sockets present on the built-in backlight cable. I pulled out the extra pins (1 on each side) using needlenose pliers. I could see only the middle 6 slots on the header were being used.

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