What was found
CAPTAIN REPORTED THAT DURING FLIGHT LIGHT AUTO SLAT FAIL CAME ON. DURING CHECK, APPLICABLE CIRCUIT BREAKERS WERE RESET AND FLAPS/SLATS WERE OPERATIONALLY TESTED TURNING ON THE OVERHEAD LIGHT IN THE SLATS PANEL LIGHTS. BITE TO BOTH STALL COMPUTERS WERE PERFORMED SHOWING AUTO SLATS FAIL RED LIGHTS. TECHNICAL PERSONNEL WAS SENT FROM MEX AND SLATS ACTUATORS WERE REPLACED IAW MM 27-80-08, TESTED CORRECT. DURING OVERNIGHT SERVICE, TESTS TO AUTO-SLAT SYSTEM, PERFORMED IAW MM 27-80-08, ALL CORRECT.