: Click Check Cloud/Online Update . If an official firmware version is hosted on the cloud servers, the UI will display a prompt to download and deploy it.

Updating the is a delicate process. A power loss or incorrect file during flashing can brick the device. Follow this step-by-step protocol.

(e.g., JA-8108-W or a board ID like Hi3520D_8CH )

Use the function in the NVR main menu to re-link your cameras. "Invalid File" Error on USB

Users have reported cameras appearing on the wrong channels. For example, a 4-camera setup might map cameras to slots "1, 3, 4, 5" instead of "1, 2, 3, 4," forcing the user to view an 8-channel grid to see everything. This channel mapping is often fixed by patches in newer firmware builds.