Dahua HCVR5104C User Manual page 628

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 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. How to restore factory default setup even I cannot login the user interface.
There are following possibilities:
Please use the reset button to restore factory default setup. Please shut down

the device, remove the top cover and front panel. Go to the mainboard and find
the button. Press
seconds. Device automatically restoring factory default setup and then reboot.
Note
Please make sure you purchased device has the reset button on the mainboard.
3. 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.

4. System cannot 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.

5. There is no video output whether it is one-channel, multiple-channel or
all-channel output.
There are following possibilities:
to boot up and then remain pressing for 5 to 10
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