System unable to reconnect to WiFi after power outage

I have seen this question asked and there are no acceptable answers. I often get power flashes where I live and almost every time the WiFi will not reconnect. I disable 5 GHZ on my router and it still will not reconnect. The app just stays in a contant loop.  The only way I get it to eventually reconnect is to unplug and remove battery to reboot it. That's fine when I'm home but I am not home half the time. Now what do I do. I may have a bad WiFi card and would like a new base station.