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The front lights are, from left to right, the hard drive (HDD), network (ONLINE / OFFLINE) and power (POWER) indicators. A blinking green network light means the recorder has reached the NUVAXS server, so you can watch remotely in the app and web app and receive notifications. If it does not light, check that the WAN port is connected to a router with internet access and that the network provides DHCP.

There are four: on the setup screen shown at first start-up, on the sticker on the case, on the circuit board inside, and at the bottom of the recorder’s System settings → System page. The app can bind with any of them through “+ Scan QR code” on its home screen; without a monitor, scan the one on the case.

There are two ways. Scan the binding QR code on the case, the circuit board or the System settings → System page with the app; if “Let others join by scanning the binding code” was ticked when binding, others can join this way too. Or the owner creates a share code under “NVR access”, with its role, validity and number of uses.

Any IP camera that supports ONVIF, whatever the brand. Before adding one, turn on ONVIF and DHCP on the camera, and audio if you want to record sound. Cameras the search does not find can be added by hand under camera management on the recorder, by entering their RTSP or ONVIF address.

The pointer hides after about 15 seconds without mouse movement; move the mouse to bring it back. If it still does not appear, unplug the USB mouse and plug it in again.

The recorder’s menus are locked. They lock automatically after a period of inactivity; unlock with the PIN, or scan the unlock QR code on the screen with the app. That code changes every 60 seconds.

The menu follows the current user’s role, and features the role does not allow are hidden. Ask the owner to change the user’s role under accounts and roles.

The calendar outlines days with recordings in blue. Select the channels to play back first; if the calendar is still blank, there are no recordings that month.

Downloading on the recorder needs a selected camera and a USB drive plugged in; it backs up clips of 30 seconds to 60 minutes. Alternatively, create a QR code to download straight to a phone; the link is valid for 1 day.

Both need the recorder to be online. Check that the network light on the front blinks green; if it does not, check the WAN cable and the router.

Open the Account tab under camera management on the recorder and check the camera’s IP address, port, user name and password. Also check the camera’s power and network cable, for example its connection to the PoE switch.

A monitor that does not accept 4K input cannot show the picture. No action is needed: after 60 seconds the recorder restores the previous resolution and restarts.

The recorder formats any drive that is not in its own format, which erases the data on it. Back up anything important before fitting the drive.

Usually the drive is full and the recorder is overwriting the oldest footage, which is normal; no need to format. Run a health check to confirm the drive is fine. Formatting erases every recording and cannot be undone.

Click the frozen tile and press "P2P" in the bar below it; if it does not recover, press the refresh icon in the same bar. If every tile is frozen, check the computer's connection or reload the page with F5.

Whether Microsoft Edge can play H.265 depends on the computer's graphics card and system components. If the picture does not show, set the camera's video encoding to H.264.