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HDD not installed.
Poor contact between the HDD carrier and HDD.
HDD is damaged.
7) Q: Blank screen in a channel of the display
A: Possible causes:
A camera is damaged. Replace the damaged camera.
The connection wire is damaged. Replace the damaged connection wire.
8) Q: No video output from single-channel, multiple-channel or all-channel.
A: Possible causes:
Program is not compatible. Please upgrade to the correct version.
Brightness value of all channel is 0. Please restore to default setting.
No video input signal or the signal is too weak.
Channel protection or screen protection is configured.
Hardware malfunction.
9) Q: Real-time video image is abnormal, such as color and brightness is distorted.
A: Possible causes:
NTSC and PAL settings are not correct, and the image becomes black and white.
Recorder and monitor resistance is not compatible.
Video network transmission distance is too far or transmission line signal attenuation is too
much.
NVR color or brightness settings are not correct.
10) Q: No recorded video can be found in local playback.
A: Possible causes:
Poor contact between the HDD carrier and HDD.
HDD is damaged.
Upgraded program is not compatible.
The recording file that you want to search has been overlapped.
The recorded file is not opened.
11) Q: Video is distorted in local search.
A: Possible causes:
Video quality setting is too low.
Program read error, bit data is too small, and there is full of mosaic in the screen. Please
firstly try to restart the DVR to solve this problem.
Disk error
Hardware malfunction.
12) Q: The monitor has no sound.
A: Possible causes:
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