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QSD42908 User’s Manual
97
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 attached well.
DVR continuously reboots after start up, and makes a sound
like “di” every 10 seconds.
1) Upgraded using wrong
firmware
2) Compression board has
problems.
3) Main board has problems.
There are no images in 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 is damaged
DVR can not control PTZ through RS-485 port. 1) RS-485 cable is not
connected correctly or is
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 DVR setup (wrong
IP, port number, username or
password, etc).
3) Old player SDK (playm4.dll)
Notes:
1) Place the DVR in well ventilated area so that it operates within the recommended range of
temperature and humidity as in specifications.
2) If the circuit board gets wet, dust on circuit board can cause a short circuit. The circuit board, plug
and socket, housing fan and housing should be cleaned by brushing.