@Rikke Please login to RE200 and provide a full screenshot of status page as the following. One more thing, what's the model No. of your wireless router? It's the router name on its label, it's...

@Problems231 it's suggested to configure the DHCP server on 740N. Please note configure DHCP server by reference to the DHCP setting on the router.

@Sjkeane2010 Your Extender is RE650, right? Via Tether app, after you configure extender， RE will need to reboot to apply all the new settings. Then you will lose the connection to its wifi. That's...

@MattHoule other device can connect to RE450 WiFi? Please check this. PS4 can be connected to your router wifi?

@El_Puto I noticed that the firmware is very old. Please update the firmware to the latest one. Here is the link. https://www.tp-link.com/support/download/tl-wa850re/v4/#Firmware Or this Download...

@Zaudi Hi If I'm not wrong you have bought 2 wired PLC? WPA4220 KIT has one WPA4220 which has wireless function. But PA4010P KIT has 2 wired PLC. PA4010P KIT do not have wireless function.