What was found
FLIGHT 3087 - LGA-BUF - LAVATORY SMOKE INDICATION ON EICAS AND GALLEY SHORTLY AFTER TAKEOFF, APPROXIMATELY 600 FEET. NO SMELL OR VISUAL INDICATION OF SMOKE IN THE CABIN OR COCKPIT. WARNING INDICATIONS CEASED AFTER APPROXIMATELY 1 MINUTE. MAINTENANCE CLEANED LAVATORY SMOKE DETECTOR CONNECTOR, OPS CHECK GOOD IAW EMB 145 MM 26-14-00. ALSO, GROUND RAN BOTH ENGINES AT HIGH POWER IAW EMB 145 MM 72-00-00. NO DEFECTS NOTED AND NO EVIDENCE OF SMOKE.