Faq - Dahua L Series User Manual

Questions
NVR cannot boot up properly.
NVR often automatically shuts
down or stops running.
System cannot detect hard
disk.
There is no video output
whether it is one-channel,
multiple-channel or all-
channel output.
I cannot search local records.
Video is distorted when
searching local records.
Time display is not correct.

7 FAQ

Solutions
● 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. Upgrade to the latest version to
solve this problem.
● Front panel error.
● Main board is damaged.
● 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.
● HDD is broken.
● HDD ribbon is damaged.
● HDD cable connection is loose.
● Main board SATA port is broken.
● Program is not compatible. Upgrade to the latest version.
● Brightness is 0. Restore factory default setup.
● Check your screen saver.
● NVR hardware malfunctions.
● HDD ribbon is damaged.
● HDD is broken.
● Upgraded program is not compatible.
● The recorded file has been overwritten.
● Record function has been disabled.
● Video quality setup is too low.
● Program read error, bit data is too small. There is mosaic in
the full screen. Restart the NVR to solve this problem.
● HDD data ribbon error.
● HDD malfunction.
● NVR hardware malfunctions.
● Setup is not correct.
● Battery contact is not correct or voltage is too low.
● Crystal is broken.
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User's Manual