Dahua HCVR5104C User Manual page 629

Program is not compatible. Please upgrade to the latest version.
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Brightness is 0. Please restore factory default setup.
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There is no video input signal or it is too weak.
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Check privacy mask setup or your screen saver.
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DVR hardware malfunctions.
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6. Real-time video color is distorted.
There are following possibilities:
When using BNC output, NTSC and PAL setup is not correct. The real-time video
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becomes black and white.
DVR and monitor resistance is not compatible.
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Video transmission is too long or degrading is too huge.
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DVR color or brightness setup is not correct.
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7. Cannot search local records.
There are following possibilities:
HDD ribbon is damaged.
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HDD is broken.
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Upgraded program is not compatible.
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The recorded file has been overwritten.
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Record function has been disabled.
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8. Video is distorted when searching local records.
There are following possibilities:
Video quality setup is too low.
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Program read error, bit data is too small. There is mosaic in the full screen.
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Please restart the DVR to solve this problem.
HDD data ribbon error.
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HDD malfunction.
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DVR hardware malfunctions.
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9. There is no audio when monitor.
There are following possibilities:
It is not a power picker.
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It is not a power acoustics.
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Audio cable is damaged.
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DVR hardware malfunctions.
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10. There is audio when monitor but there is no audio when system playback.
There are following possibilities:
Setup is not correct. Please enable audio function
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Corresponding channel has no video input. Playback is not continuous when the
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screen is blue.
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