Router connection is possible but the Internet is not working

pu1. Sometimes it's because of a problem with the modem connected to the Internet when the router is working but the Internet is not working. Try turning off and on the internet modem connected to the router

2017-11-25

OK

pu2. If you go into the Network and Sharing Center, it'll be marked with an X, but if you press it once, the window may modify itself and make it available on the Internet, so try it

2017-11-25

OK

pu4. Turn off all the power, unplug the internet line, and try connecting it again in a minute
Then it's often reset and it works

2017-11-25

OK