Canon EOS M2 - Power Saving  P

Turning on the Power
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 To save power, the LCD monitor turns off automatically if you do not
operate the camera. If you continue to not operate the camera, the power
will turn off automatically. While the LCD monitor is off, operation such as
pressing a button will turn on the LCD monitor again. If the power turns off,
either press the power button or press the <x> for at least approx. 2 sec.
to turn on the power again.
 You can change the LCD monitor auto off time and camera auto off time
with [LCD auto off] and [Camera auto off] under [52: Power saving]
(p.210).
3 Power-saving Features