WPS Button doesn't light up anymore.

First of all, i use a wifi extender to ethernet into my desktop since the router in my house is connected to another family member's PC. Ive been using WPS with no problems until this morning when i saw my Extender unpaired and my desktop being unable to connect to internet. I tried to pair again but when i went to press the WPS button on the router, nothing. No blinking or anything. I tried just pressing it and waiting for it to pair to see if it was just an issue with the lights but no, still nothing. Its been working fine like i said and Nobody has done anything different i.e. Restart, reset, no power outages, nothing. 

Any help would be appreciated!