H.264 Network Digital Video Recorder User Manual
Page 51
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 DVR 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 DVR is damaged.
2、 The DVR 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 DVR.
6 The hardware of the DVR 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.
Possible reasons are as followed:
1 The program is not matched. Please update the program.
2 The image brightness is all 0. Please restore the default setup.
3 There is no video input signal or the signal is too weak.
4 The channel protection or the screen protection is set.
5 The hardware of the DVR is damaged.
5、 Real-time image problems such as the image color or the brightness distortion.
Possible reasons are as followed:
1 When using the BNC output, the option between the N mode or PAL mode is wrong and the
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