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• Why is there no output of single channel, multi channel or all channel video?
2016-10-28

*Check the adaptor of camera whether to see if it is well-connected.

*Check the cable for connecting video input/output in the back panel of DVR.

*Insert the video source directly into the display device and check if they are causing the problem.

*Check the brightness of the picture and bring it back to its original default setting.

*No video input signal or too weak.

*Display settings in the preview set to be closed.

*The hardware of DVR is defective.

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