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Why does the device just show embedded NVR in monitor and restarts every few minutes?
Take out all HDDs from the device, and disconnect all the cameras,
If it works, you should check the HDD or camera. The DVR is in good condition itself;
If it doesn’t work, it means you should check the power of DVR or change the monitor with high resolution;
If user tries all the above steps and still in vain, please contact your seller for repair.