Often a fixture becomes inoperative due to causes not attributable to the ballast. It is therefore important to examine all fixture components before removing the ballast for replacement. We recommend the following general procedures for both magnetic and electronic ballast.
Replace or check all lamps to ensure satisfactory operation.
As lamps are removed, examine all sockets to ensure they are not damaged or broken and are making proper and positive contact with the lamps.
Examine all electrical connections within the fixture, including at the lamp sockets, to ensure conformance with the wiring diagram on the ballast.