As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURNBACK/DECLARED EMERGENCY-----------------------------------------------------RIGHT AFTER TAKE OFF FIRST OFFICER SIDE FAILURES WERE: NO DATA ON COMPASS ROSE, NO HEADING BUG ON PRIMARY FLIGHT DISPLAY OR NAVIGATION DISPLAY. NO LATER FLIGHT DIRECTOR, NO SPEED TREND VECTOR, ALSO TRAFFIC ALERT COLLISION AVOIDANCE SYSTEM FAIL TO ILLUMINATE. / R&R INTERIAL SYSTEM DISPLAY UNIT IAW AMM.