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Just show a image no other thing when I turn on it, what should I do?

This problem means you haven’t create any content for the display, it has no task.
If you have created a content and uploaded it to the display via WiFi, it will show the advertising program you made.

Disclaimer

Important: This site is for more audiences to learn us, And to show the digital signage messages for you our partner. Which pictures or videos from our clients in post are allowed, If You still find any images, videos or words violate your copyright.
Please do not hesitate to contact us.