User manual

85XX Series Network DVR User Manual……………………………………………………………………….V1.0
- 106 -
3. Optional Part
Chapter 7 FAQ
If your problem is not in below, call our hotline and we will resolve any issues or problems you may have.
1. Question：Why DVR can’t work after starting it?
Answer：
 Check the adaptor input
 Check the on-off power line, does it well-connected?
 Check the on-off power
 Check the upgrade procedure whether it’s wrong
 Check the main board of DVR whether it’s ok
2. Question：Why DVR will automatic reboot or stop after starting DVR several minutes?
Answer：
 Instability or low input voltage
 Bad track hard drive or the line of hard drive is bad
 On-off power supply is not enough
 The front-end video signal instability
 High temperature, too much dust, too bad the DVR operating environment
 The main board is not well-connected with other board
 The hardware of DVR is fault
3. Question: Why there is no output of single channel, multi channel or all channel video?
Answer:
 Please check the adaptor of camera whether it is well-connected
 Please check the connect line for connecting video input and video output in the back board of