1. Below the information on the back of the advertising machine are: power network socket, USB socket, network cable socket, open the shutter, you can see the system shutdown function button, after the power on, cover the shutter, and tighten and fix the screws on both ends, to avoid unnecessary danger.
2. If there is dust and dirt, please turn off the machine and unplug the power plug, make sure the power is off, wipe the screen with a semi-moistened soft cloth, and gently wipe the screen with a cleaning cloth.
3. If you find any abnormality in the advertising machine, immediately turn off the power and unplug the power plug. Do not remove the back cover for inspection or maintenance. Please call the after-sales service of the product in time and consult professional maintenance personnel for maintenance.