Some lamps do not
come ON
Lamp is defective
•
Ballast is defective
•
Connection between ballast and
•
PCB
Connection between ballast and
•
lamp
Change a working lamp with the
•
defective lamp to confirm a lamp
out or ballast out
Verify wire connection between
•
ballast and PCB
Verify wire connection of ballast
•
and lamps on the terminal block