Screen not connecting to the internet (Wired LAN/Ethernet)

Safely get your display online via wired (Ethernet). A secure, stable LAN connection enables:

Saving whiteboards remotely to cloud or network storage
Wireless screen mirroring with better reliability and bandwidth
Built‑in web browsing and access to updates and apps

Symptoms

Display shows “Not connected” or no IP address in network settings
Ethernet link LEDs are off or intermittently flashing
Apps that require internet fail to load or time out

Quick check

Confirm the LAN cable is fully inserted until it clicks at both ends (wall/switch and display).
Look for link/activity LEDs near the display’s LAN port or the upstream switch.

Expected result

Link LEDs are active on the display and switch/router.
The display obtains an IP address via DHCP and shows “Connected” in network settings.

If not, follow the full instructions below.

Full instructions

Replace the Ethernet cable with a known‑good one. Ensure the connector clicks into place and link LEDs (if present) light up.
Test the wall/network port. Plug the same cable into another device (e.g., a laptop) to verify the port is live and correctly networked.
Try another LAN port on the display (if available). This isolates a potential faulty port.
Review network and firewall policies. Ensure the display’s MAC/IP is permitted for DHCP, DNS, NTP, and any required services. Blocked outbound or inbound rules will prevent connectivity.
Open the display’s admin settings. Verify the Ethernet interface is enabled, set to obtain IP via DHCP (unless your network uses static IPs), and not restricted by VLAN or port‑disable controls.

If you still can’t connect

Temporarily bypass intermediate hardware: connect the display directly to a known‑good switch or router LAN port.
Check for MAC address filtering on your network and add the display’s MAC to the allowed list.
Ask your network admin to confirm that DHCP, DNS, and NTP are reachable from the display’s VLAN/subnet.
Get in contact with support by making a hardware support ticket at support.i3-connect.com

Security best practices for a safe connection

Prefer wired LAN for classrooms and meeting rooms: it’s more stable and easier to manage than ad‑hoc Wi‑Fi.
Use a managed network segment (VLAN) for displays with appropriate firewall rules allowing only essential services (DHCP, DNS, NTP, update servers, screen sharing).
Lock admin settings with a strong PIN and limit who can change network configurations.

Item	What to verify	How to confirm
DHCP availability	Display receives a valid IP, subnet mask, gateway, DNS	Network settings show populated fields; ping DNS/gateway from an admin device
DNS + NTP reachability	Firewall allows UDP/TCP for DNS and NTP to approved servers	Resolve known hostnames; time sync on display is correct after network join
MAC allow‑list / NAC	Display’s MAC is permitted on the switch/WLAN and assigned to the correct VLAN	Port authentication logs show success; switchport in correct VLAN

FAQ

Can I use Wi‑Fi instead of Ethernet?

Yes, but Ethernet is recommended for reliability, performance, and easier security control. If Wi‑Fi is necessary, use enterprise‑grade SSIDs with proper segmentation and strong authentication.

Do I need a static IP?

Most environments work best with DHCP reservations. Use static IPs only if your network policies require it and you can manage DNS and routing accordingly.

Whiteboard saves fail even when online—why?

Saving to cloud or network shares may require additional outbound URLs/ports or credentials. Verify the destination service is permitted through the firewall and that the display is signed in with the correct account.