Remove the back panel and flip it over to see a metal plate covering the power button and fingerprint sensor; use plastic tweezers to carefully pry up the metal plate along with the small strip connected to it up to the length indicated in the picture.

Use your finger to pop the power button and fingerprint sensor out of its slot in the back panel; there should be a plastic frame around the power button/fingerprint sensor component.

Use plastic tweezers to pry up and remove the plastic frame and strip connected to the power button and fingerprint sensor.