Dahua NVR21-4 KS2 Series, Руководство пользователя

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FAQ 335
7 FAQ
Questions Solutions
NVR cannot boot up
properly.

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.
NVR often automatically
shuts down or stops
running.

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.
System cannot detect
hard disk.

HDD is broken.

HDD ribbon is damaged.

HDD cable connection is loose.

Main board SATA port is broken.
There is no video output
whether it is one-channel,
multiple-channel or
all-channel output.

Program is not compatible. Please upgrade to the latest version.

Brightness is 0. Please restore factory default setup.

Check your screen saver.

NVR hardware malfunctions.
I cannot search local
records.

HDD ribbon is damaged.

HDD is broken.

Upgraded program is not compatible.

The recorded file has been overwritten.

Record function has been disabled.
Video is distorted when
searching local records.

Video quality setup is too low.

Program read error, bit data is too small. There is mosaic in the full
screen. Please restart the NVR to solve this problem.

HDD data ribbon error.

HDD malfunction.

NVR hardware malfunctions.