What was found
SEA FLIGHT NR 2496: CHECK PFD 1 ILLUMINATED. 3 SECONDS LATER, CHECK ED ILLUMINATED. RAN PFD 1 CHECKLIST. CAUTION DID NOT GO AWAY. RAN SECOND CHECKLIST, ED MESSAGE WENT AWAY. MAINTENANCE REINITIALIZED PFD'S AND ED. ALL FAULTS WENT AWAY AND DID NOT REAPPEAR. PERFORMED OPS CHECK OF PFD 1 IAW MTC 6316104. OPS CHECK GOOD. PERFORMED OPS CHECK OF ED IAW AMM TASK 31-61-01-710-803. OPS CHECK GOOD. AIRCRAFT REMAINS CAT 3 AND FLIGHT DECK PLACARD REFLECTS SAME. MTS CONTROL WAS NOTIFIED. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.