First, ensure that the strobe is receiving power from the fire alarm panel by checking the wiring connections and voltage levels. If power is confirmed, try adjusting the candela setting on the strobe to ensure it’s set correctly for the environment. Additionally, check for any obstructions blocking the light output of the strobe. If these steps don’t resolve the issue, it’s possible that the strobe itself is defective and may need to be replaced. Contact the manufacturer or supplier for further assistance or to arrange for a replacement unit.