(Power) button.
The illumination LED goes out and PCS is turned off.
(Power) button before disconnecting PCS from the wall outlet.
(Power) button may not respond when the power should not be turned off, such as when the system software is being updated. Wait for a while and try again.
(Power) button is pressed during the copy process, the process is canceled. See the illumination LED to make sure that no process is being performed and it is safe to turn the power off. For the meanings of the illumination LED, see "Illumination LED meanings."