Digital Video Recorder User Manual
24
Chapter 5-FAQ and Maintenance
5.1 FAQ
1. System cannot detect hard disk
Possible reasons are as follows:
(1)The hard disk power supply line is not well 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.
2 There are no video outputs in single channel, multiple channels and all channels.
Possible reasons are as follows:
(1)The program is not matched. Please update the program.
(2)The image brightness is all 0. Please resume 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.
3. Real-time image problems such as the image color or the brightness distortion.
Possible reasons are as follows:
(1)When using the BNC output, the option between the NTSC mode or PAL mode is wrong and the
image becomes black and white.
(2)The DVR is not matched with the monitor impedance.
(3)The video transmission distance is too far or the loss of the video transmission line is too large.
(4)The color and brightness setting of the DVR is wrong.
4. I cannot find the video files in local playback mode.
Possible reasons are as follows:
(1)The data line of the hard disk is damaged.
(2)The hard disk is damaged.
(3)Update the different program with the origin program files.
(4)The video files to search are covered, or search time is wrong, please refer to the device display time.
(5)The recording stopped.
5 The local playback video is not clear.
Possible reasons are as follows:
(1)The recoding image quality is too bad.
(2)The reading program is wrong. Reboot up the DVR.
(3)The data line of the hard disk is damaged.
(4)The hard disk is damaged.
(5)The hardware of the DVR is damaged.
6 There is no audio signal in the surveillance window.
Possible reasons are as follows:
(1)It is not an active tone arm.
(2)It is not an active sound box.
(3)The audio lines are damaged.
(4)The hardware of the DVR is damaged.
