Q-See QC818 User Manual page 43

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. Combo NVR hardware malfunction.
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. Crystal is broken.
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 multiple-cast group setup in combo NVR. This mode can result in mosaic.
Usually we do not recommend this mode.
d. There is privacy mask or channel protection setup.
e. Current user does not have monitoring rights.
f. NVR 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. PC or combo NVR network card is not good.
15. Burn error /USB backup error. Possible Causes:
a. System uses too much CPU resources. Try stopping recording first and then begin
backup.
b. Data amount exceeds backup device capacity. It may result in burner error.
c. Backup device is not compatible.
d. Backup device is damaged.
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16. Remote control does not work. Possible Causes:
a. Need to enter the correct Device ID on the remote control.
b. Distance is too far or control angle is too wide.
c. Remote control battery power is low.
d. Remote control is damaged or NVR front panel is damaged.
17. Can not playback the downloaded file. Possible Causes:
a. There is no media player.
b. Need Divx Codec in file player
18. Forgot local menu operation password or network password
a. Contact Q-See tech support and we can generate a new password for the unit.
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