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• There is an HDD malfunction, or something is wrong with the HDD cable.
• There is damage to the DVR's main motherboard.
2. DVR often shuts down and stops running.
Below are a few possible reasons why this may be occurring:
• The input voltage is too low or is not stable.
• There is an HDD malfunction, or something is wrong with the HDD cable.
• The power button is damaged or malfunctioning.
• Video output signal is not stable.
• The insides of the DVR have accumulated too much dust.
• The temperature is either too hot or too cold.
• The hardware is malfunctioning.
3. The system does not detect a hard drive.
Below are a few possible reasons why this may be occurring:
The hard drive is broken.
• The hard drive cable is damaged.
• The hard drive cable connection is loose.
• The DVR's main motherboard SATA port is broken.
4. There is no video output on any of the channels.
Below are a few possible reasons why this may be occurring:
• The DVR firmware is incompatible with the attached cameras. Upgrade to the latest firmware.
• The image brightness is set to 0. Change the brightness using the image settings or restore the
DVR to factory default settings.
• There is no video input signal, or the signal is too weak.
• A privacy mask or screensaver may be enabled.
• There might be a malfunction with the DVR hardware.
5. Real-time video color is distorted.
Below are a few possible reasons why this may be occurring:
• When using a BNC output, NTSC and PAL may be setup incorrectly. The real-time video may
become black and white.
• The DVR is not compatible with the monitor.
• The video transmission cable is too long, or signal degradation is too great.
• The DVR's color or brightness settings are not correctly configured.
6. Local Recordings are not searchable.
Below are a few possible reasons why this may be occurring:
• The hard drive cable is damaged.
• The hard drive is broken.
• The DVR's firmware is incompatible with the recorded video.
• The recorded files have been overwritten.
• The recording function has been disabled.
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