What was found
REJECTED TAKEOFF DUE TO TAKEOFF CONFIG PREVIOUS WRITE-UP. OCCUPIED AS SOON AS I PUSHED THE THROTTLE MODULE & THE POWER CAME UP. RELEASED THE BRAKES. DURING TAKEOFF CONFIGURATION WARNING TEST AMM 31-51-00-5 FOUND CONFIG LIGHT & AURAL WARNING ON WITHOUT ASSOCIATED EICAS MSG. REMOVAL & INSTALLATION OF TAKEOFF CONFIGURATION WARNING MODULE M620, PERFORMED IAW AMM 31-51-04-4, ALL TEST PASSED. NO MORE CONFIG WARNING DURING TAKEOFF. ACFT OK FOR SERVICE.