As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT SIDE VTK ILLUMINATED FOLLOWED BY MAP FLAG AND NO INFORMATION ON EITHER CDU'S FMC-L INOPERATIVE. GROUNDED - YES. REPLACED THE LH FMC PER B737-900 MM 34-61-02/401. OP-CHECKS GOOD. THIS CLEARS MEL 34-36J. PLACARDS WITH C/N 28060402 REMOVED. CONFIGURATION CHANGE REVERSED BY PLACING FMC SELECT SWITCH BACK TO NORMAL. SEAMC STEEVE WAS NOTIFIED.