Hello team. I just bought a an Re300 ac1200 wifi extender and I managed to used it for 1 week, but afer that it started to saying connected but no internet. 

I have check my main router and there is a internet connection,  so i tried also to reset the the extender to start over again but to no avail and having the same problem and now it only detects my 2.4ghz connection and unable to see my 5ghz connection, please advise on what to do.