Replacing the hard drive on an iMac Intel 27-Inch EMC 2309 and 2374 requires a series of meticulous steps. Firstly, the glass panel must be removed using two heavy-duty suction cups. Following this, the LCD must be detached, taking care to disconnect the cables that connect it to the logic board.

Once the LCD is removed, the logic board must be taken out, which involves removing several screws and connectors. The hard drive is then accessible and can be replaced. The replacement drive must be a 3.5″ SATA hard drive, and an SSD may be used if accompanied by a 2.5″ to 3.5″ adapter.

Reassembly involves reversing the steps, ensuring all screws and connectors are correctly replaced. Special attention must be given to the LCD temperature sensor connector, which needs to be reconnected to the hard drive. Finally, the glass panel is reattached using the suction cups.

This process requires time and precision, as well as specific tools including a spudger, T10 Torx Screwdriver, and T8 Torx Screwdriver. It’s crucial to follow the steps accurately to avoid damaging the machine.

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