As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ON GROUND FMC AMBER ALERT LIGHT ILLUMINATED AND FMC MENU PAGE GOES BLANK CAPTAINS MAP HAS VTK FLAG. THE ALERT COMES ON AND OFF. GROUNDED - YES. PERFORMED L/H FMC BITE PER B737-900 FIM 34-61 TASK 801. FOUND NO CURRENT FAULTS. FOUND NO FAULT HISTORY. PERFORMED CDS BITE PROCEDURE PER FIM 31-62 TASK 801 AND FOUND NO FAULTS. COULD NOT DUPLICATE PROBLEM.