1. Yes 2. Yes 3. Yes 4. Model NVG468Q, P/N: 599052-003-00

@TP-Link when I turn the router off completely I can connect to the Tl4220 with the app tpPLC. When the router is on I get time out message when trying to connect via tpPLC.

@TP-Link Hi! it's version 5 of the TL4220. We Also have a v4 that works fine. Don't know the version number of the one we changed. we have tried all of the above. Both Wi-Fi and cable drops out....

When I turn the router off the wifi connection to the TL-WPA4220 starts to work again. The router is a ARRIS model NVG468Q

@uxd I have the exact same problem. Started lats week from nowhere. Has been running for several years with two different routers and suddenly on extender fails. We changed that one out the other day...