VDH-NK380 Hardware Manual
9
Q 6.
No recorded file in local side
A : The possible causes:
1. Wrong data cable or jumper error in the hard disk
2. Hard Disk error
3. Upgraded firmware cannot recognize the existing file system
4. Desired files are overwritten
5. Recording not enabled
Q 7.
Bad image when playback
A : The possible causes:
1. Low recording quality
2. Once data error when reading or small bit-rate or fuzzy when playback,
please reboot machine
3. Wrong data cable or jumper error in the hard disk
4. Hard Disk error
5. NVR hardware error
Q 8.
No audio sound
A : The possible causes:
1. Not powered-speaker
2. Audio cable error
3. NVR hardware error
Q 9.
Live video with audio, but no sound when playback
A : The possible causes:
1. Wrong setting: audio not enabled
2. No video to the paired channels; when the screen is blue, playback will
be choppy.
Q 10.
Wrong time
A : The possible causes:
1. Wrong settings
2. Bad battery connection or low voltage
3. Bad frequency oscillator
Q 11.
Motion detection not function
A : The possible causes:
1. Wrong schedule setting
2. Wrong area setting
3. Low sensitivity
4. Hardware limitation for different version
Q 12.
Fail to login by using client software or Web browsers
A : The possible causes:
