Sometimes I do not get connection to my FritzBox. After some investigation I found out that this was caused by one of my Powerline 520 E adapters. It was not working as expected, although the LED’s were suggesting otherwise

I installed the Fritz! Powerline application on my OSX machine and I checked if all my adapters where shown.

I noticed that one of the adapters is not shown.

How to fix this

  1. Click on the adapter that is shown and toggle the Green mode and Switch on LED Display checkboxes
  2. Click the OK button
  3. Changes will be applied
  4. If you are lucky this will fix the problem and the second adapter will appear again.
  5. If not, you have to plug/unplug the faulty adapter and try the above steps again.