Turn on the Brain
Turn on the Brain by pressing the Check button on the Brain with the battery inserted.
If the brain does not turn on, check the battery level. If a battery is not used for a long period of time it will need to be woken up in order to power the brain. To wake up the battery, press the battery check button or plug it into a power source. For more information on charging and checking the battery level, view this article from the VEX Library.
Turn off the Brain
Turn the Brain off by holding the X button until the screen on the Brain goes black.