As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L2 SERVICE DOOR CYCLES BETWEEN GREEN CLOSED INDICATION TO A YELLOW CIRCLE WITH BLACK X AND THEN TO RED OPEN INDICATION WITH ASSOCIATED EICAS MESSAGE. FOUND CONNECTOR PLUG LOOSE. RESECURED IT IAW AMM 52-12-00. OPS CHECK GOOD. ALSO CLEANED CONNECTOR IAW SWPM 20-61-20.