Q-See QSF2648016 - Manual (Page 117)

User Manual for Commercial Series Net DVR
Page
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Appendix E Troubleshooting
Failure Possible reasons
After plugging in power, turning on the power switch,
“POWER” light in front Panel does not turn on, and fan
does not work.
1) Power cable is damaged.
2) Power supply is damaged.
After plugging in power, turning on the power switch,
“POWER” light in front panel turn to green while fan does
not work.
1) Front panel cable is
damaged.
2) Fan is broken.
After plugging in power, turning on switch, “POWER”
light turn to green, the indicator lights in the panel turn on
at the same time, but fan does not work.
The ATX plug in main board is
not plugged in well.
DVR continuously reboots after start up, and makes a
sound like “di” every 10 seconds.
1) Used wrong firmware
upgrade
2) Compression board has
problems.
3) Main board has problems.
There are no images on the monitor connected with VOUT
after DVR is started.
1) The cable connected with the
monitor is damaged.
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 damaged.
2) The power cable of hard disk
is not connected.
3) Hard disk has problems.
No reponse in HyperTerminal interface. 1) Baud rate does not match.
2) RS-232 cable is damaged.
3) Serial port of PC is damaged.
4) RS-232 port of DVR is
damaged.
DVR can not control PTZ through RS-485 port. 1) RS-485 cable is not
connected correctly or
damaged.
2) PTZ parameters error.
3) RS-485 port of DVR is
damaged.
Client software can not view DVR live image. 1) Network error.
2) Wrong connectinon settings