You will find the power switch on the back of the roof bracket. Some roof brakcets have a push button, others have a toggle switch.
Use the push button or toggle switch to power the unit Off or On. If the unit does not power on immedietly, you may need to wait for up to 20 seconds for the unit to start up depending on the model of VDU.
It is reccommended to keep the VDU's powered on at all time. This will ensure units are fully up to date and will allow the Lockdown feature to funtion properly.
From the VCC, you can activate Power Management mode. This will dim the screen so it does not display. To wake, touch the screen or move the cart.