Appendix E Troubleshooting - Q-See QSC26404 User Manual

Appendix E: Troubleshooting
After plugging in power, turning on the power switch,
"POWER" light in front Panel does not turn on, and fan
does not work.
After plugging in power, turning on the power switch,
"POWER" light in front panel turns to green while fan does
not work.
After plugging in power, turning on switch, "POWER"
light turns to green, the indicator lights in the panel turn on
at the same time, but fan does not work.
DVR continuously reboots after start up, and makes a
sound like "di" every 10 seconds.
There are no images in the monitor connected with VOUT
after DVR is started.
Cannot find the hard disk in reboot process.
DVR can not control PTZ through RS-485 port.
Client software can not view DVR live image.
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.
QSC26404 User's Manual
Failure
86
Possible reasons
1) Power cable is damaged.
2) Power supply is damaged.
1) Front panel
damaged.
2) Fan is broken.
The ATX plug in main board is
not attached well.
1) Upgraded using
firmware
2) Compression board
problems.
3) Main board has problems.
1) The cable connected with the
monitor is damaged.
2) Real board of DVR has
problems.
3) Main board of DVR has
problems.
1) Hard disk cable is damaged.
2) The power cable of hard disk
is not connected.
3) Hard disk is damaged.
1) RS-485 cable
connected correctly
damaged.
2) PTZ parameters error.
3) RS-485 port of DVR is
damaged.
1) Network error.
2) Wrong DVR setup (wrong
IP, port number, username or
password, etc).
3) Old player SDK (playm4.dll)
cable is
wrong
has
is not
or