Troubleshooting - Q-See QC series User Manual

A.3 TROUBLESHOOTING
1. The DVR does not boot up properly Possible Causes:
a. Input power is not correct - check power supply.
b. Power switch button is damaged.
c. Updated firmware using wrong file.
d. Hard drive malfunction or something wrong with hard drive cable.
e. Main board is damaged.
2. DVR often automatically shuts down or stops running. Possible Causes:
a. Input voltage is not stable or it is too low.
b. Hard drive malfunction or something is wrong with the cable.
c. Device is not getting enough power.
d. Working environment is too hot, or too much dust.
e. System board malfunction.
3. System cannot detect hard drive. Possible Causes:
a. No hard drive is installed
b. Hard drive is damaged.
c. Hard drive cable connection is loose.
d. Main board SATA port is damaged.
e. DVR is not receiving enough power.
4. There is no video output to one or more channels. Possible Causes:
a. Updated firmware using wrong file.
b. Brightness is 0. Please restore factory default setup.
c. There is no video input signal or it is too weak.
d. Check privacy mask setup.
e. Loose power or video cable connection.
5. Real-time video color is distorted. Possible Causes:
a. When using BNC output, NTSC and PAL setup is not correct. The real-time video
becomes black and white.
b. DVR and monitor resolution settings are not compatible.
c. Video cable is too long signal is becoming degraded.
d. DVR color or brightness setup is not correct.
6. Cannot search local records. Possible Causes:
a. HDD cable is damaged.
b. HDD has failed.
c. The recorded file has been overwritten.
d. Record function has been disabled.
7. Video is distorted when searching local records. Possible Causes:
a. Video quality setting is too low.
b. Program read error, bit data is too small. There is mosaic in the full screen. Please restart
the DVR to solve this problem.
c. Hard drive data cable error.
d. Hard drive malfunction.
e. DVR hardware malfunction.
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