@Trace-2018
Hi, thanks for posting question here.
If no network access with your router and the internet LED is red, please try the steps below:
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.