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Before removing the HDD you need to remove the temperature sensor attached to it and keep it for installation on the new HDD
The HDD temperature sensor is mounted directly on the hard drive using adhesive tape and a protective foam cushion.
Carefully peel off the foam and set the sensor aside. Be gentle with the foam, since you will need to reuse it to connect the heat sensor to the new HDD.
Lift the HDD out carefully, and disconnect the two SATA cables from the drive.
Replace the heat sensor in about the same position on your new HDD. Make sure the flat surface of the sensor is flat against the metal hard drive enclosure, and add some adhesive tape to the foam if necessary to keep it in place.
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