I have recently purchased the Archer AX50 and tried to set it up for my Fibre connection and have had no luck. My old Asus modem works fine. Connecting directly to the modem works fine. I have followed all the steps in the TP Link troubleshooting and no luck. I have tried a crossover ethernet cable for the WAN port as well as straight and nothing. I am not sure what else to try as support is also not getting back to me.