When figuring out how to fix a light fixture at home, always make sure the power is turned off. If you’re working with the wiring, it’s a good idea to call an electrician to make sure you don’t get shocked or hurt.The first thing you need to do is shut off the power to the fixture. Depending on the style of the fixture, you may need to unscrew a light bulb to cut the power. If you’re not sure how to do this, call an electrician. Next, remove the cover for the light fixture.