Wi fi connection to my LG smart tv went off and I have tried several different methods and it still wont come on.

Wi fi connection to my LG smart tv went off and I have tried several different methods and it still wont come on.  I have gone to location and changed to Canada and then back to US and still doesn't work.  I have turned if off and waited holding the on button on the control for 30 seconds and then turned it back on and still doesn't work.  I have redone the wi fi network and password and still doesn't work.  ???????