Please make sure the power adapter is connected and the turn on the power button of the HDMI cameras. The power LED of HDMI cameras will show blue when turned on.
If the monitor is black, please check the following aspects:
1) Check whether the cover of the HDMI cameras is removed.
2) Check whether the light from the object to the sensor of the HDMI camera is clear. To confirm this, please remove the cameras from microscope or other devices to check whether you can see the environment light.
3) Check the HDMI connection. Replug the HDMI cable or change the HDMI cable to confirm.
4) Now the video format of HDMI cameras is 16:9. Select the corresponding mode of the monitor.
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