Dahua MXVR4104 User Manual page 224

6) Q: HDD cannot be detected after rebooting.
A: Possible causes:
 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 channels 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.
 Device 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.

FAQ 214