Monitor the camera screen black
Exclusion method: 1, can display the screen channel can not be displayed on the screen channel, if there is a picture description is the problem of monitoring the head. Troubleshooting power, power is not enough power. Line problems and so on.
Acquisition card problem if not your driver is not installed. That is the acquisition card itself is a problem
2, the channel can be displayed on the screen can not be displayed on the screen channel.If no picture that you install the software problem, re-install the driver. Or reinstall the software, remember to restart