Deco x20 works, all mobile phones; en other laptops en other stuff works and have WIFI connection. But Printer HPpro8720 does not get a connection, does recognize wifi network and when entering password, it tries to connect for a long time but does not succeed. Not even with WPS function. A 4-year-old laptop also wont't connect.  I set to try my WIFI to WPA2 and 2,4GHZ; but that doesn't make anu difference.