Dahua XVR User Manual

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6 FAQ
1. DVR can not boot up properly.
There are following possibilities:
 Input power is not correct.
 Power connection is not correct.
 Power switch button is damaged.
 Program upgrade is wrong.
 HDD malfunction or something wrong with HDD ribbon.
 Seagate DB35.1，DB35.2，SV35 or Maxtor 17-g has compatibility problem.
Please upgrade to the latest version to solve this problem.
 Front panel error.
 Main board is damaged.
2. DVR often automatically shuts down or stops running.
There are following possibilities:
 Input voltage is not stable or it is too low.
 HDD malfunction or something wrong with the ribbon.
 Button power is not enough.
 Front video signal is not stable.
 Working environment is too harsh, too much dust.
 Hardware malfunction.
3. System can not detect hard disk.
There are following possibilities:
 HDD is broken.
 HDD ribbon is damaged.
 HDD cable connection is loose.
 Main board SATA port is broken.
4. There is no video output whether it is one-channel, multiple-channel or
all-channel output.
There are following possibilities:
 Program is not compatible. Please upgrade to the latest version.
 Brightness is 0. Please restore factory default setup.
 There is no video input signal or it is too weak.
 Check privacy mask setup or your screen saver.
 DVR hardware malfunctions.
5. Real-time video color is distorted.
There are following possibilities:
 When using BNC output, NTSC and PAL setup is not correct. The real-time video
becomes black and white.

Dahua XVR Specifications

General

Channels	4/8/16
Video Compression	H.265/H.264
Audio Input	Yes
Audio Output	1 channel RCA
Video Output	HDMI/VGA
Recording Resolution	720P
HDD	1 SATA
Network Interface	RJ45
USB Interface	2 USB 2.0
Power Supply	12V DC
Operating Temperature	-10 °C to +55 °C