Sony HDR-CX100 - Manual (Page 17)

Rec
or
ding
1
US
Recording
Recording
Recording movies
In the default setting, movies are recorded with
high definition image quality (HD) on the internal
memory (p. 43, 48).

Fasten the grip belt.

Open the lens cover.

Open the LCD screen of your camcorder.
Your camcorder is turned on.
To turn on your camcorder when the LCD screen is already open, press POWER (p. 15). 
POWER button