As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
F/O'S FMC NOT RESPONSIVE TO BUTTON PRESS. ACFT GROUNDED. FOUND CLEAR BUTTON STUCK ON MCDU CLEANED AND FREE BUTTON RESET RT FMC COMPUTER AND MCDU BREAKERS ACCOMPLISHED RT MCDU KEY TEST IAW FIM 34-61-802 AND FMC BITE IAW 34-61-801. OPS NORMAL.