How to reset NHD-851? Follow Where is the reset button? Unscrew and remove the camera's dome cover. Disconnect and reconnect power (Ethernet cable from NVR or PoE switch to the camera), then press and hold the reset button for 10 seconds. Related articles How to get your Swann product model, P2P or UID, MAC address or ID, Serial Number (S/N), and Software/Firmware (FW) version? Password Reset using Swann Security VMS software for Windows Contact Swann Tech Support Re-registering SwannCloud Cameras NHD Cameras Firmware Update for NVR Systems Comments 0 comments Article is closed for comments.