Security Camera King DVR-CVI8240M User Manual page 235

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