As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PREFLIGHT THE FIRST OFFICERS FD FLIGHT DIRECTOR OFF FLAG REMAINED ILLUMINATED. ACFT GROUNDED. PERFORMED FIM 22-15/816, CYCLED ACFT POWER, FAULT DID NOT REOCCUR. FOUND TO BE AN INTERMITTENT FAULT. NO FAULT MESSAGE AFTER DFCS BITE.