Canon PIXMA MP190 Series Quick Start Manual page 14

Screen-saver Mode
The LED goes out if the machine is not operated for about five minutes*.
Perform a print operation to restore the display.
* You cannot change the wait time before the LED goes out.
Note
When you want to restore the display, perform a print operation or press any button except for the
ON button. When you press the ON button while the machine is in Screen-saver mode, the
machine turns off.
10 Before Using the Machine