To begin with, we must unhook the straps, since that way we will work with greater comfort.

To remove the back cover with heart sensor, we must remove the four Triwing screws (Y0.6), and with the help of a thin and metallic tool we will pry until it is unhooked, and once it is unhooked we will disconnect the connector from the heart sensor.

We disconnect the components that are connected to the motherboard, and we will remove the adhesive that is on top of the motherboard and the speaker.

We extract the Phillips screws (PH # 00) that hold the motherboard, and with the help of a flat tool we will lift it.

We take off the area of the battery contacts, with a flat tool we will take it off.

With the help of a flat tool we will lift the intermediate housing just enough, to be able to detach the power button and thus remove the motherboard.