What was found
F/O'S MCDU DISPLAY HAS A SINGLE LINE ACROSS THE TOP OF DISPLAY. ALL ELSE FUNCTIONS NORMALLY. GROUNDED - YES. REMOVED AND REPLACED RH FMC CDU IAW B737-800 AMM 34-61-01-000-802 AND AMM 34-61-01-400-802, SOFTWARE CONFIGURATION GOOD IAW IPC34-61-01-03 SHEET 4, LH FMC CDU IS PN 174101-03-01 AND IS LOADED WITH SOFTWARE PN 3463-SMI-001-02, ETOPS GROUND FUNCTIONAL CHECK GOOD IAW AMM 34-61-01-400-802 AND AMM 34-61-01-400-801. PARAGRAPH D. CLEARS MEL 34-36L SEAMC AUSTIN NOTIFIED. NO AIRCRAFT CONFIGURATIONAL CHANGE.