I have successfully used Devolo Powerline products for many years and currently have the white 500 units around the house. There are three ring circuits from the main fuseboard (Upstairs, Downstairs & Kitchen)and the Devolo units have been happily working in them. Two days ago the ones on the Kitchen and Upstairs circuits wouldn't work (red flashing indicator showing poor or no connection). Plug the same units into the downstairs ring and they work fine. The existing ones downstairs have continued to work normally. Does anyone have any thoughts about this? Its a real puzzler for me as to my knowledge nothing has changed. All electrical equipment works on the circuits in question. Thanks.
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