DVR systems DVRxx04HF-U Series - Manual (Page 172)

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z DVR and monitor resistance is not compatible.
z Video transmission is too long or degrading is too huge.
z DVR color or brightness setup is not correct.
6. Can not search local records.
There are following possibilities:
z HDD ribbon is damaged.
z HDD is broken.
z Upgraded program is not compatible.
z The recorded file has been overwritten.
z Record function has been disabled.
7. Video is distorted when searching local records.
There are following possibilities:
z Video quality setup is too low.
z Program read error, bit data is too small. There is mosaic in the full screen.
Please restart the DVR to solve this problem.
z HDD data ribbon error.
z HDD malfunction.
z DVR hardware malfunctions.
8. There is no audio when monitor.
There are following possibilities:
z It is not a power picker.
z It is not a power acoustics.
z Audio cable is damaged.
z DVR hardware malfunctions.
9. There is audio when monitor but there is no audio when system playback.
There are following possibilities:
z Setup is not correct. Please enable audio function
z Corresponding channel has no video input. Playback is not continuous when the
screen is blue.
10. Time display is not correct.
There are following possibilities:
z Setup is not correct
z Battery contact is not correct or voltage is too low.
z Crystal is broken.
11. DVR can not control PTZ.
There are following possibilities:
z Front panel PTZ error