Powerline adapters have been set up for years and have worked perfectly until this morning. On each adapter all 3 lights are green. The ethernet led is blinking away happily as usual showing that data is being transferred. However there is no internet connection at any of the 4 adapters spread around the house. I have rebooted everything several times. I have also reset each adapter and re-paired it with the one next to the router. I have changed the ethernet cable and tried other power outlets but nothing works. I'm at my wit's end! Any help would be appreciated. I should also mention there was a lightning storm last night. Power never went out and all the devices seem to be in working order,  apart from no Internet of course. Wifi is working fine.

Thanks!