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104
FAQ
If your questions are not solved by following the answers in this document, contact your local
customer service or call customer service at headquarters. We will guide you to solve your problems.
1. Q: Disconnect the constant electricity but the device is still working.
A: Possible reasons:
The UPS setting provides constant power supply to the device when the lithium battery
voltage is above 7V.
2. Q: The device gives squeal after start.
A: Possible reasons:
Connecting to the display and being too close to the camera.
A single channel interface or a large-image multi-channel interface. The first route of sound
comes from a local source.
3. Q: The interface shows that no SIM card is detected.
A: Possible reasons:
SIM card not inserted.
Micro SIM card reversely inserted with its notch facing outward. Follow instructions on the
label to insert the SIM card.
SIM card is damaged.
4. Q: DVR cannot boot up properly.
A: Possible reasons:
The input power is not correct; the input voltage is too low or too high.
Poor contact in the input power cable or incorrect wiring.
HDD is damaged or poor contact between the HDD carrier and HDD.
Main board is damaged.
5. Q: DVR automatically reboots or frequently crashes.
A: Possible reasons:
Input voltage is unstable or too low
The device is not properly installed, which result in poor contact between components.
Poor heat dissipation and too many dusts result in poor working environment for the device.
Hardware malfunction.
6. Q: Blank screen in a channel of the display.
A: Possible reasons:
A camera is damaged. Replace the damaged camera.
The connection wire is damaged. Replace the damaged connection wire.
7. Q: There is no video output for single channel, multiple channels or all channels.
A: Possible reasons:
Incorrect program. Upgrade to the correct program.
Image brightness is set as 0. Restore to default settings.
Video input signal is null or too weak.
Channel protection (or screen protection) is set.
Hardware malfunction.
8. Q: Real-time video image is abnormal, such as color and brightness is distorted.
A: There are the following possibilities:
NTSC and PAL settings are not correct, and the image becomes black and white.
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