When I plug in the power line adaptor and then plug in and turn on the 2nd unit in another room, then all of a sudden the Internet stops working on my TV and on the TalkTalk router. Strangely it did...

And then they plug it into their own brand router for WiFi. But it hasn't a make or m model on it?

@Solla-topee this is a picture of the modem talk talk use. Which is an Open Reach one.

Hi, since moving to a new Internet provider and getting a new TalkTalk router, when I plugged my Powerline Adapter Av1300 back in it now cuts out all Internet access, even from the new main TalkTalk...