What was found
DEPARTING FROM KLCK TO KMIA, DURING THE INITIAL TAKEOFF ROLL BEFORE 60 KNOTS, THE ASTER CAUTION ILLUMINATED WITH THE ENG REVERSER LIGHT ON. INITIATED A REJECTED TAKEOFF, VACATED THE RUNWAY, AND ACCOMPLISHED THE APPLICABLE NON-NORMAL CHECKLIST. THE LIGHT DID NOT EXTINGUISH, AND WE DECIDED TO RETURN TO THE CARGO PARKING AREA. THE BRAKE COOLING SCHEDULE WAS REVIEWED AS A PRECAUTION DUE TO THE SHORT GROUND TIME. MAINTENANCE TROUBLESHOT AND ITEM WAS DEFERRED PER MEL 78-014-03 CAT C C/W DDPG 78-1.