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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
