Quaddrix QT-500-16

2) Real board of DVR
has problems.
3) Main board of DVR
has problems.
Cannot find the hard disk in reboot
process.
1) Hard disk cable is
broken.
2) The power cable of
hard disk is not
connected.
3) Hard disk is broken.
No response in HyperTerminal interface. 1) Baud rate is not
matched.
2) RS-232 cable is
broken.
3) Serial port of PC is
broken.
4) RS-232 port of DVR
is broken.
DVR can not control PTZ through RS-485
port.
1) RS-485 cable is not
connected correctly
or broken.
2) PTZ parameters
error.
3) RS-485 port of DVR
is broken.
Client software can not view DVR live
image.
1) Network is error.
2) Connect wrong DVR
(wrong IP, port
number, username
or password, etc).
3) Need to upgrade to
a newer client SW
version.
Notes: