Optiview DVR4Lite Manual page 26

3. Why the images are distorted?
① Check whether the video connection is short circuit or open circuit, or has false welding or poor connection; ②
Video cable is interfered with by strong electricity; do not install the video cable and the strong electricity circuitry
together and also choose qualified shielded cable; ③ In the whole system, connect only the center DVR to earth;
otherwise, it will cause common mode interference; connect the grounding screw at the rear side of DVR to earth;
④ Check whether the DVR, monitor or the circuitry is aged.
(III) Video recording/playing, recording data, backup
1. Why the recording has no audio?
① Check whether "Mute" is activated; ② Check whether "Audio" is selected in the settings of video recording; ③
Check the audio input cable.
2. Why I can't perform timing recording or can't record any data within the period?
① The period of timing recording is invalid. The time points should be within 00:00-24:00 and the end time must be
later than the beginning time; ② The power supply is cut off in the timing recording process; ③ The desired data
have been overwritten; ④ The HDD has physical damage or logical error and the data can't be read normally.
3. Why I can't perform moving recording or alarm recording?
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