Are you able to access the router after this power outage?
The only thing that I can think of after power outage, there might be problems if the router initializes before the cable modem, and doesn't get correct ip information to know it's connected to the Internet.
I don't have a 942l, but my other dlink cameras come back online after power failure, wireless included. (Unless there is a red light on the router saying its not connected to the world).
If that is the problem, there are power cycling devices to correctly turn on the modem first, then the router 2nd. 4gstore should have a few models.