With the factory default setup, the CDR 830 will automatically turn on and start recording video when the power cord is plugged in. 

To start or stop video recording, press the REC button (right side, bottom button).  A red icon will flash in the upper-left corner to indicating recording mode.

While a video is recording:

Press the UP button to mute the microphone.  Audio will not be recorded. Press the DOWN button to lock the video file.  The current video will be permanently saved and will not be overwritten. Press the MODE button to blank the display (video recording will continue).