As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CARGO DOOR LIGHT EICAS AND CARGO DOORS DISCREET LIGHT CAME ON DURING FLIGHT. 3 LIGHTS ON MAIN ENTRANCE DOOR PANEL WERE EXTINGUISHED. EXECUTED QRH PROCEDURES. REMOVED & REPLACED THE PSEU PER THE ABOVE AMM REFERENCE, ALL TESTS PASS.