Most common explanation is that the kiosk was left in a cold environment over night and needs time to warm up (plug in and wait 10 min before rebooting)
However check the computer is working:
- Computer panel and lights?
- Two green light on the right and one blue light on bottom left will indicate if working
- Any no signal errors on the screen?
Was it working prior to moving for event?
Did the kiosk experience any hard knocks during transportation to event?