Powerline has stopped working in my garden office. It was working for the first six months. 

Now it will pair in the house but when I move the extender to my garden office, less than 10m from my house, either the right lights come on but it's 'no internet, secured' on the wifi, or sometimes the wifi light will not come on. 

The ethernet connection also does not work. 

I'm cannot tell whether the firmware needs updating as the most recent date for the WPA4220 is prior to when I bought the extender, and there is no update for version 3 of the PA4010.