Monitor the camera why the black screen?
Second, check the next line is a problem, if the line is no problem, it may be a camera is broken, you can use the replacement method for testing, with a good camera to replace the test, if there is an image that the camera is bad The
First, check the power supply under the surveillance camera is a problem, if it is infrared surveillance cameras, can see the red light at night, then that power supply normal; if not, you can use a multimeter on the power supply and power lines to measure.
Third, look at the video terminal whether there is a problem, because the video equipment is not set up or with the inappropriate black screen will appear.
Fifth, the control camera control equipment, such as DVR / NVR / capture card, check its related software is running properly, whether the latest version, if not suggested to contact the manufacturer to upgrade the software can be.
Fourth, the monitoring of the video signal line broken (including line damage, poor contact), but also cause a black screen
