Hello @Andrew26
Thank you for reaching out to the community.
- Can you perform another factory reset and see if the TL-WPA4220 still broadcast Wi-Fi signal after reset?
For the wireless powerline devices, we have two methods to reset it.
1) Factory eset via the RESET button/ RESET hole
With device powered on, prress and hold the Reset button (or use a pin to press reset hole) until all LEDs will turn off and start on again.
Or Reset via tpPLC Utility : https://www.tp-link.com/support/faq/1612/
-Check on different network devices like a laptop or mobile device
If still the same may i know when did you purchase the power line device? Will the Wifi SSID show up after a factory reset, how about the Wifi Led(4th led which is also a Wifi button) is ON/OFF on the WPA4220?