Hi  @DincDonc 

Thanks for reaching out to us. 

You may try the suggestions below:

1. Please plug this powerline device to a different wall outlet or power extension. 

2. Please reset the device: With the powerline adapter plugged into the wall socket, press and hold its Pair button for more than 6 seconds until the Power LED goes off momentarily and comes back on.

If the device still has no lights,  I am afraid this device has hardware issue. We recommend reaching out to the local tech support, so they can work with you in looking into the issue further or help with the replacement.