User manual

Page
56
5 FAQ and maintenance
5.1 FAQ
If the problems are not listed, please contact the local service or call the HQ service. We are willing
to offer the service.
1、 The NVR can not boot up normally.
Possible reasons are as followed:
1 The power supply is not correct.
2 Switch power supply line is not in good connection.
3 Switch power supply is damaged.
4 The program updating is wrong.
5 The hard disk is damaged or the hard disk lines are broken.
6 The front panel is damaged.
7 The main board of the NVR is damaged.
2、 The NVR reboots automatically or stops working after boot up a few minutes.
Possible reasons are as followed:
1 The input voltage is not stable or too low.
2 The hard disk is damaged or the hard disk lines are broken.
3 The power of the switch power supply is low.
4 Frontal video signal is not stable.
5 Bad heat radiator or too much dust or bad running circumstance for the NVR.
6 The hardware of the NVR is damaged.
3、 System can not detect hard disk.
Possible reasons are as followed:
1 The hard disk power supply line is not connected.
2 The cables of the hard disk are damaged.
3 The hard disk is damaged.
4 The SATA port of main board is damaged.
4、 There are no video outputs in single channel, multiple channels and all channels.