Q-See QC40198 - Manual (Page 132)

TROUBLESHOOTING
QC40198 User Manual
123 | P a g e
10 TROUBLESHOOTING
1. Combo DVR does not boot up properly.
Possible causes:
 Input power is not correct, check power supply.
 Power switch button is damaged.
 Updated firmware using wrong file.
 Hard drive malfunction or something wrong with hard drive cable.
 Front panel error.
 Main board is damaged.
2. The LCD does not work after device boots up.
Possible causes:
 The screen is damaged during the transportation resulting from heavy vibration.
 You have pressed the M button, but there is no PC signal input. Please press M again to resume.
 The LCD connection is loose. Please contact Q-see for help.
 Updated firmware using wrong file.
3. Combo DVR often automatically shuts down or stops running.
Possible causes:
 Input voltage is not stable or it is too low.
 Hard drive malfunction or something is wrong with the cable.
 Device is not getting enough power.
 Front video signal is not stable.
 Working environment is too hot, or too much dust.
 System board malfunction.
4. System cannot detect hard drive.
Possible causes:
 No hard drive is installed
 Hard drive is damaged.
 Hard drive cable connection is loose.
 Main board SATA port is damaged.
5. There is no video output to one or more channels.
Possible causes:
 Updated firmware using wrong file.
 Brightness is 0. Please restore factory default setup.
 There is no video input signal or it is too weak.
 Check privacy mask setup or your screen saver.
 Combo DVR hardware malfunctions.