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Alhua - Dahua DVR Manual

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FAQ 290
7 FAQ
1. DVR cannot 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 jumper configuration.
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 frequently 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 jumper configuration.
Button power is not enough.
Front video signal is not stable.
Working environment is too harsh, too much dust.
Hardware malfunction.
3. Hard disk cannot be detected.
There are following possibilities:
HDD is broken.
HDD jumper 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.
DVR and monitor resistance is not compatible.
Video transmission is too long or degrading is too huge.
DVR color or brightness setup is not correct.
6. Cannot search local records.
… 303 …


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  • We have lost power on our DVR, there is power up to the power supply,
    and the whole system is coupled to a UPS system for some time......
    we have had zero lightning and any effects of load shedding is nullified by UPS system,
    could you kindly inform what could be wrong PLEASE ?
    Chris Gibson 0827932600 Submitted on 22-2-2023 at 12:16

    Reply Report abuse


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