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Possible reasons are as followed:
1
The program is not matched. Please update the program.
2
The image brightness is all 0. Please restore the default setup.
3
There is no video input signal or the signal is too weak.
4
The channel protection or the screen protection is set.
5
The hardware of the DVR is damaged.
5
、
Real-time image problems such as the image color or the brightness distortion.
Possible reasons are as followed:
1
When using the BNC output, the option between the N mode or PAL mode is wrong and the
image becomes black and white.
2
The DVR is not matched the monitor impedance.
3
The video transmission distance is too far or the loss of the video transmission line is too
large.
4
The color and brightness setting of the DVR is wrong.
6
、
I can not find the video files in local playback mode.
Possible reasons are as followed:
1
The data line of the hard disk is damaged.
2
The hard disk is damaged.
3
Update the different program with the origin program files.
4
The video files to look up are covered.
5
The recording is not on.
7
、
The local video is not clear.
Possible reasons are as followed:
1
The image quality is too bad.
2
The reading program is wrong. Reboot up the DVR.
3
The data line of the hard disk is damaged.
4
The hard disk is damaged.
5
The hardware of the DVR is damaged.
8
、
There is no audio signal in the surveillance window.
Possible reasons are as followed:
