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4
、
Q: No video output on one or more channels
A: Possible cause:
1
Program not compatible. Re-upgrade with right program
2
Image brightness becomes 0. Restore default settings
3
No video signal input or signal too weak
4
Has channel privacy mask (or screen view blocker) set up
5
DVR hardware failure
5
、
Q: Real-time video problems, such as severe distortion on video color and brightness.
A: Possible cause:
1
When using BNC output, if NTSC and PAL format selection is incorrect, video image
becomes black and white
2
DVR and monitor impedance mismatched
3
Video transmission distance is too far or video signal attenuates too much in transmission
line
4
DVR color and brightness settings are incorrect
6
、
Q: Local playback search finds no video
A: Possible cause:
1
Hard drive cable or jumper error
2
Hard drive is damaged
3
Upgraded with a program different to the original program in the system
4
The video being searched has already been overwritten
5
Recording function is not turned on
7
、
Q: Local search returns blurred video
A: Possible cause:
1
Video quality setting is too low
2
Program data read error; Video streaming very low; Full screen mosaic during playback.
Usually DVR will return to normal after restart
3
Hard drive cable and jumper error
4
Hard drive malfunction
5
DVR hardware failure
