· Try restarting the device with power off
· Please upgrade the APP to the latest version
· For network reasons, please use the hotspot mode to connect the device
 1) If the hotspot mode can output images, please try to reconfigure the network or change the network connection
 2) If the hotspot mode Under the black screen, please try to upgrade the firmware version.
• If the system time in the upper right corner is normal or normal voice intercom is available, but the image is black, it is a hardware problem. Contact the seller to repair the equipment.