2 yr old 635 Router almost dead......

Hi,

My 2yr+ old 635 "SuperRouter" has stopped presenting a web page that I would use to login and monitor and maintain its operation.  I've tried Chrome (always used to work), Edge, Ie, and Firefox and the result is the same - connection refused.

I have power cycled it - giving it 10 seconds of off time, and have finally reset it using the recessed reset button on the back, and still get the same result.

So I have two questions:

a: Can it be fixed?

b: Is TT under any obligation to replace it?

thanks!