48" fluorescent light fixture with two bulbs, but only one side works. . Can that be fixed?
Remove the metal cover from the fixture. There's a black ballast inside that is probably causing your problem. Take some pictures of the wiring and then disconnect all the wires going to the ballast, after turning off the power. Bring the ballast to a home store or electric supply store for a replacement. Then just re install it. A bit of friendly advise: just buy a new fixture as it will probably be cheaper than buying the ballast.