Fig. 15: Thelio internal power switch (underside of the Thelio IO board).
The Thelio IO power button can be used to power on the Thelio when the top case is removed.
The button is located on the underside of the Thelio IO Board (Fig. 15, above).
Motherboard Power button
The motherboard power button is connected on the part
of the front panel header missing a pin. Due to a design
oddity of motherboards used for Thelio, the positive and
negative power button lines must be flipped. This is the
pinout:
Fig. 16: Motherboard power button and Thelio Power Button connections.