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B.
Bad power supply connection.
C.
Switch power supply is damaged.
D.
Firmware update failed to install correctly.
E.
The hard disk is damaged or the hard disk lines are broken.
F.
The front panel is damaged.
G.
The main board of the DVR is damaged.
2.
The DVR reboots automatically or stops working after boot up a few
minutes.
Possible reasons:
A.
The input voltage is not stable or too low.
B.
The hard disk is damaged or the hard disk lines are broken.
C.
The power of the switch power supply is low.
D.
Frontal video signal is not stable.
E.
Bad heat radiator or too much dust or bad running circumstance for
the DVR.
F.
The hardware of the DVR is damaged.
3.
System cannot detect hard disk.
Possible reasons:
A.
The hard disk power supply line is not connected.
B.
The cables of the hard disk are damaged.
C.
The hard disk is damaged.
D.
The SATA port of main board is damaged.
4.
There are no video outputs in single channel, multiple channels and
all channels.
Possible reasons:
A.
The program is not matched. Please update the program.
B.
The image brightness is all set to 0. Please restore the default setup.
C.
There is no video input signal or the signal is too weak.
