The light on the front of our house was burned out so I put in a fresh bulb. And it still didn't work. Then another and another and no joy. None of the sockets work. The porch lights is on the same circuit and works fine.
(Rhetorical) How does a light fixture just stop working? There is no physical damage.
I'll be the good husband and tell my wife we need a new fixture rather than trying to re-wire it or whatever it needs. She's wanted a different design anyway.