additional info:
It established the connection just twice. The physical reset of the router
must have succeeded but it required password that is not default. And I seem
to have forgotten the correct password.
And after it succeeded in establishing connection, I turned off the router
and turned on it immediately, then the icon started to round eternally,
again, both times.
The second time when it succeeded it, the only difference from the first time
was that I flicked the switch down that is next to the reset button on the
router. I have been explained about the switch but I am still not sure about
its functions.
