1. Hold only one of the following sets of buttons simultaneously (at the same time):
- hold down '2' and '3' or
- hold down '5' and '6' or
- hold down the 'Division' and 'Multiplication' buttons
2. While holding on the buttons, press the "ON" button [C/CE]
3. The calculator turns off.
(Hold for 3-4 seconds if its not working)