1: Check if the server parameters are set correctly and if the backend service is started.
2: Whether the operating computer and terminal are connected to the same server, and whether the terminal network configuration and server IP are configured correctly.
3: Whether the playback content is created, saved, and distributed to the terminal through backend software through the network or USB flash drive.
4: If the relevant content cannot be displayed properly: please check if the terminal configuration is correct, the scene production resolution selection is correct, and if the content has been transmitted to the device.