@Shids OK, I didn't get that. So you just have to connect the TV box to the RE220. Its ethernet port should work for wired connections out of the box. If TV box don't get any ethernet connection try...

@AndrewFD As a start update your RE firmware to the latest version TL-WA850RE(EU)_V7_1.0.13 Build 231115 from here. This could probably resolve your issue, since this FW release fixes some problems...

@Shids If you want your RE220 to be wired to your router, you have to change its working mode to AP. - details.

@tpl Nope. As I mentioned, this is a security feature which is not meant to be disabled.

@reyravivish Follow this video on how to recover your WR940N.

@AvvDev If you have more that 100 mbps from your ISP you need at least a gigbit router to utilize this bandwidth.