As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 4450 - FIRST OFFICER’S PRIMARY FLIGHT DISPLAY UNIT FAILED, TOTAL DARK AT 65 KTS, RETURNED TO GATE. AIRCRAFT REMOVED FROM SERVICE. REMOVED AND REPLACED THE FIRST OFFICER’S PRIMARY FLIGHT DISPLAY UNIT IAW AMM 34-22-01. OPS CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE.