I have a pair of powerline adapters which I have used successfully more than 10 years to link the router in my lounge to the desktop PC in my home office.  

Today I relocated the router and the powerline adapter in my lounge to a new position and a different power socket (on the same power circuit).  But I am unable to persuade the powerline adapters to "talk" to each other again.  

I have followed all the instructions in the TP-Link installation guide, but no success.  

Any ideas very gratefully accepted.