Technical Manual

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8. There is no audio when monitoring. Possible Causes:
a. Channel with audio is not full screen, make the channel you want to hear audio on full
screen.
b. Audio cable is damaged.
c. No speaker or damaged speaker.
d. Low volume.
e. No microphone.
9. There is audio when monitoring but there is no audio when system plays back.
Possible Causes:
a. Setup is not correct. Please enable audio function
b. Corresponding channel has no audio input.
10. Time display is not correct. Possible Causes:
a. Setup is not correct
b. Battery contact is not good or voltage is too low. Replace battery.
c. Incorrect time zone.
11. Motion detection function does not work. Possible Causes:
a. Period setup is not correct.
b. Motion detection zone setup is not correct.
c. Sensitivity is too low.
12. Cannot log in client-end or web. Possible Causes:
a. For Windows 98 or Windows ME user, please update your system to Windows XP or
later.
b. ActiveX control has not been enabled.
c. Video card driver on computer may need to be upgraded.
d. Network connection error.
e. Network setup error.
f. Password or user name is invalid.
13. There is only mosaic no video when previewing or playing back video file remotely.
Possible Causes:
a. Network bandwidth is not sufficient.
b. Computer does not have enough resources to handle video flow.
c. There is privacy mask or channel protection setup.
d. Current user does not have monitoring rights.
e. DVR local video output quality is not good.
14. Network connection is not stable. Possible Causes:
a. Network is not stable.
b. IP address conflict.
c. MAC address conflict.
d. DVR network card error.
15. USB backup error. Possible Causes:
a. System uses too much CPU resources. Try stopping recording first and retry backup.
b. Data amount exceeds backup device capacity.
c. Backup device is not compatible.
d. Backup device is damaged.