As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
YELLOW MAINTENANCE LIGHT ILLUMINATED WITH GREEN SYSTEM OK. LED ILLUMINATED AND NO MALFUNCTION CODES DISPLAYED. CREW DEFERRAL IAW MEL 26-10-3A. MAINTENANCE ACTION REQUIRED. CDU MX TEST INDICATED AC 4725 FALSE ALARM, RESET BREAKERS. FINAL CDU INDICATION SYSTEM OK IAW DC-8 MM 26-15-00-0-0001.