Frequently Asked Questions - CnM 8 Channel H.264 Digital Video Recorder User Manual

5. Frequently Asked Questions

If your problem is not listed below, please call our support line on 09015565758 (calls charged at 50p per
minute) or email support@cnmsecure.com.
1. Question: DVR is not working after starting？
Answer:
Check the adaptor input.
Check the power line, is it well-connected?
Check the power on-off.
Check the upgrade procedure.
Check the main board of DVR.
2. Question: DVR is rebooting automatically or stopping after several minutes?
Answer:
Instability or low input voltage.
Bad track on the hard drive or the connection of hard drive is not correct.
On-off power supply is not enough.
The front-end video signal instability.
High temperature, too much dust, or a bad DVR operating environment.
The main board is not connected with other boards correctly.
The hardware of the DVR is defective.
3. Question: No output of single channel, multi channel or all channel video?
Answer:
Please check the adaptor of camera to see if it is connected.
Please check the cable for connecting video input/output in the back panel of DVR.
Please insert the video source directly into the display device and check if this is the cause
of the problem.
Check the brightness of the picture and reset it back to its original default setting.
No video input signal or signal is too weak.
Display settings in preview are set to be closed.
The hardware of the DVR is defective.
39