What was found
AFTER SELECTING FLAPS 15, RECEIVED SINGLE CHIME MASTER CAUTION ANNC, FLAPS & ADVANCE SWS ON THE MAP & CONTROL FAULT ON THE OVERHEAD, INBD PAIRS FLASHING. PRESSED RESET BUTTON ON FLAP PANEL IAW CHECKLIST, WHICH WAS UNSUCCESSFUL. IAW QRM EAP -68, EMERGENCY DECLARED. REPLACED THE FCU, OPERATIONS CHECKED GOOD.