@DPZ 

Hi, thanks for posting question on our community.

Is your modem a pure modem or a wireless router? Is the internet connection type is Dynamic IP or PPPoE provided by TM Unifi broadband?

If it is dynamic IP, according to the red internet light on the router, you may try:

    1. Unplug your router from the modem, connect your PC directly into the modem to verify the Internet status of your ISP.

    2. Reboot the ISP Modem and the Router, you must firstly power on the Router, once the router's fully powered on, power on the modem.

    3. Login to the web UI via http://tplinkwifi.net and set it up following the Quick Setup.

    4. If your PC has Internet when connected to the modem, but the Router still doesn't, please go to Advanced > Network > Internet > Mac Clone to clone the mac address of your PC. This FAQ contains detailed instructions of Mac Clone.