If software methods fail, you may need to perform a physical reset on the motherboard:

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: Use a "Superadmin" tool or a date-based password table to find the specific code for that day. : Enter the username and the generated date-specific password. Common Default

Look at the displayed on your DVR's monitor (e.g., 2024-05-20).

Below are the top 4 methods to regain admin access, ordered from easiest to most technically involved.

If all else fails, you can physically reset the AHB8204 HNN to factory defaults. This (network, user accounts, recording schedules) but will not delete your recorded video footage (stored on the hard drive).