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TROUBLESHOOTING QC40198 User Manual
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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.