125
It is not an active speaker.
Audio cable is damaged.
Hardware malfunction.
13)
Q: There is audio under monitoring state but no audio under playback state.
A: Possible causes:
Audio function is not enabled.
The corresponding channel does not connect to the camera. Playback is not continuous
when the screen is blue.
14)
Q: System time is not correct.
A: Possible causes:
Setting is not correct.
Poor battery contact or voltage is too low.
Crystal oscillator is poor.
15)
Q: USB backup error.
A: Possible causes:
Too much data which occupies CPU resources. Please stop recording first and then begin
backup.
Backup Recorder is not compatible.
Backup Recorder is damaged.
The backup Recorder features high power and needs separate power supply.
16)
Q: Alarm function does not work.
A: Possible causes:
Alarm setting is not correct.
Alarm cable connection is not correct.
Alarm input signal is not correct.
There are two loops connected to one alarm Recorder.
17)
Q: Messy channel display.
A: Possible causes:
Incorrect selection of camera type. Auto switch is recommended.
The camera is damaged.
18)
Q: Record storage time is not enough.
A: Possible causes:
Low camera quality, dirty lens, camera installed against the light, or iris not properly
adjusted caused large big rate.
HDD capacity is not enough.
The HDD is damaged.
19)
Q: No 3G/4G dial-up. No dial-up IP,
