It is actually easy to do

Start dealing random cards:

• Press the green power button for more than 5 seconds (while the dealer is on). When the display shows “00” and the vulnerability zones blink, you have entered the “Dealer power button menu”. With each click (circle), select the next item from the following menu options:

         

• Select number 6 – equal to 6 presses on the power button

To stop random dealing:

Simply turn the dealer off.