As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI THE CREW REPORTED THE FIRST OFFICERS FLIGHT DISPLAYS FLICKERING. THE NR 2 SYMBOL GENERATOR WAS IDENTIFIED AS THE FAULT AND WAS REPLACED. A SATISFACTORY OPERATIONAL CHECK WAS PERFORMED OF THE FLIGHT DISPLAY SYSTEM AND AIRCRAFT WAS RELEASED FOR CONTINUED SERVICE.