Dahua NVR21-4KS3 Series User Manual page 470

Questions
I cannot connect to the IPC
After I set the NVR resolution
as 1080P, my monitor cannot
display.
My admin account has been
changed and I cannot log in.
After I login the Web, I cannot
find the remote page to add
the IPC.
There is IP and gateway, I can
access the internet via the
router. But I cannot access the
internet after I reboot the NVR.
I use the VGA monitor. I want
to know if I use the multiple-
window mode, I see the video
from the main stream or the
sub stream?
Daily Maintenance
● Use the brush to clean the board, socket connector and the chassis regularly.
● The device shall be soundly earthed in case there is audio/video disturbance. Keep the device
away from the static voltage or induced voltage.
● Unplug the power cable before you remove the audio/video signal cable, RS-232 or RS-485 cable.
● Do not connect the TV to the local video output port (VOUT). It might result in video output
circuit.
● Always shut down the device properly. Use the shutdown function in the menu, or you can press
the power button in the rear pane for at least three seconds to shut down the device. Otherwise
it might result in HDD malfunction.
● Make sure the device is away from the direct sunlight or other heating sources. Keep the sound
ventilation.
● Check and maintain the device regularly.
Reasons
● Make sure that the IPC has booted up.
● IPC network connection is right and it is online
● IPC IP is in the blocklist.
● The device has connected to the too many IPC. It cannot
transmit the video.
● Check the IPC port value and the time zone is the same as
the NVR.
● Make sure current network environment is stable.
Shut down the device and then reboot. When you reboot,
press the Fn button at the same time and then release after 5
seconds. You can restore NVR resolution to the default setup.
Use telnet and then input the following command:
cd /mnt/mtd/Config/
rm -rf group
rm -rf password
Reboot the device to restore the default password.
Clear the Web controls and load again.
Use command PING to check you can connect to the gateway
or not. Use telnet to access and then use command "ifconfig–a"
to check device IP address. If you see the subnet mask and the
gateway has changed after the reboot. Upgrade the
applications and set again.
● For 32-channel series product, the 9/16-window is using
the sub stream.
● For 4/8/16 series product, system is using the main stream
no matter you are in what display mode.
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User's Manual