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D.
The channel protection or the screen protection is set.
E.
The hardware of the DVR is damaged.
5.
Real-time image problems such as the image color or the brightness
distortion.
Possible reasons:
A.
When using the BNC output, the option between the N mode or PAL
mode is wrong and the image becomes black and white.
B.
The DVR does not match the monitor impedance.
C.
The video transmission distance is too far or the loss of the video
transmission line is too large.
D.
The color and brightness setting of the DVR is wrong.
6.
I cannot find the video files in local playback mode.
Possible reasons:
A.
The data line of the hard disk is damaged.
B.
The hard disk is damaged.
C.
Update the different program with the origin program files.
D.
The video files to look up are covered.
E.
The recording is not on.
7.
The local video is not clear.
Possible reasons:
A.
The image quality is too bad.
B.
The reading program is wrong. Reboot up the DVR.
C.
The data line of the hard disk is damaged.
D.
The hard disk is damaged.
E.
The hardware of the DVR is damaged.
8.
There is no audio signal in the surveillance window.
Possible reasons:
