As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PUSH BACK, THE OVHT/DET LIGHT ILLUMINATED ON THE MASTER CAUTION ANNUNCIATOR PANEL ALONG WITH THE FORWARD CARGO FAULT LIGHT. THE CREW FOLLOWED QRH PROCEDURES AND RETURNED TO THE GATE. MAINTENANCE FOUND FAULT LIGHT ON FORWARD CARGO ELECTRONIC UNIT. PERFORMED TEST ON FORWARD CARGO ELECTRONIC UNIT. NO DEFECTS WERE FOUND. MAINTENANCE PLACED THE FORWARD CARGO COMPARTMENT FIRE DETECTION/SUPPRESSION SYSTEM ON MEL. AIRCRAFT WAS RETURNED TO SERVICE.