As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CARGO SMOKE LIGHT ILLUMINATED WHILE THE FLIGHT CREW WAS PREFLIGHTING THE AIRCRAFT. MAINTENANCE FOUND NO INDICATION OF SMOKE OR FIRE. THE DETECTOR ELECTRICAL CONNECTORS WERE DISCONNECTED AND THE SMOKE LIGHT STAYED ON. THE CONNECTORS WERE RECONNECTED AND THE WEU WAS RERACKED. ALL CHECKS WERE GOOD AND THE AIRCRAFT WAS RELEASED.