What was found
L FWD ENTRY DOOR EICAS MESSAGE WHILE TAKING THE RUNWAY. MESSAGE APPEARED TWO MORE TIMES DURING TAXI. DID NOT NOTICE AN OVERHEAD PANEL LIGHT. LEFT DOOR WAS NOT USED ON THIS FLIGHT. OPENED ACCESS PANEL FOR S10094 AND PERFORMED VISUAL INSPECTION OF LEFT ENTRY DOOR, NO DEFECT NOTED. ACTUATED PLUNGER TARGET BY FINGER AND NO BINDING NOTED. CLEANED PLUNGER TARGET. REINSTALLED ACCESS PANEL. ACCOMPLISHED ADJUSTMENT AND TEST ( SYSTEM TEST ON THE DOOR WARNING SYS) IAW AMM 52-71-00-5, ALL TEST PASSED. NO HISTORY WITHIN 90 DAYS. A/C OK FOR SVC.