An update: This morning I started working with a laptop with wifi connection to the basement Deco unit, which sits on the same desk, i.e. the distance is short. Connection was created immediately and...

Hi I've had a 3 unit Deco P9 system from February this year. The Deco is in router mode.All units are connected directly to mains, no extension cords are used. Main unit and one of the satellites are...