Devices do not connect after travel

Apr 25, 2018
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I am experiencing a strange problem with the wifi connection I have at home. I usually use 2 pcs and two android devices with the network. Today one of the pcs connects without any problem, but the other three fails to connect to the internet ("connected, no internet"). The only difference I can think of is that I have recently returned from abroad were I had the three devices that are failing with me, were they were connected to various hotel networks. Could this cause the trouble, and what should I do. I have, of course, restarted my router several times, but as I said the pc that stayed at home works fine all the time