On the front of the machine under the marquee where the on/off switch is push the buttons in this order
Menu
Speaker / -
Speaker / - (you will now be at a gear)
Menu
Bright / -
Bright / -
Bright / -
Bright / -
Menu
Speaker / - until you get over English
Menu
Then the 2nd button on the left to exit. Has like a screen expand and back curved arrow.