Electricians: Chandelier went out but it's getting current

[UberSparky]

In box in ceiling you have a switched hot and neutral. If the tick tester reads at bulb when switch is on and not when its off, it is reasonable to assume you have power. Only remaining answer if this is true(need multimeter to be sure) is loose neutral in switch box, fixture box, or previous device box that is still working but not providing neutral down line to chandelier.