Vacron VDH-NK160 Hardware Manual page 11

4. Main board SATA slot error
Q 4. No output: Single, multiple or all channels
A : The possible causes:
1. Wrong firmware: Update to the right firmware
2. Brightness set to 0: set it to the default value
3. No signal input or signal too weak
4. Mask used
5. NVR hardware error
Q 5. Live video problems: Such as bad colors, brightness error, image blink...
A : The possible causes:
1. Impedance mismatch between digital video recorder and monitor.
2. Video transmission distance is too far or video transmission line
attenuation is too much.
3. Wrong settings of colors, brightness in the NVR
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
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Hardware Manual
VDH-NK160