Can no longer get internet access to my tvs using Nighhawk X6 AC3200

Oh my goodness, I changed the settings to ap mode and lost internet all together, so I had to hard reset the router.   I am no longer in ap mode.  But,now the TV still connects to the router  but now says I have internet connection, but none of the apps will open.    So I got one step further but still no bueno.   

anything else I can try.....is there any type of settings in the router I should be looking at?   I am not router tech savy by any means and honestly have no idea what 75% of the settings mean but I can check or uncheck things.   I would think something had of changed the night before or yesterday morning for my tv internet connection to just stop working.   

My last resort is to go buy a new router, which I really do not want to do.  so if there is anything else I can try please let me know.  Thanks a million for your direction.