Here are several steps to take if you have noticed the kiosk is powered off or has no power in it.
Has there been a power cut in the Dealership? Test the plug socket with another device (e.g. phone/laptop charger/)
Check the power cable is properly plugged in to the kiosk/wall and hasn't been physically damaged. (Test another socket/Power Cable)
The Big red power button - is this in the "ON" position and is there a light in it?
Providing the above is working, press one time the Green/Silver button above the network cable, to power the kiosk on.