As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT DIVERTED FOR: AFTER TAKEOFF NUMEROUS INDICATIONS AS FOLLOWS - WING ANTI-ICE SHOWN ON WHEN OFF; APU GEN SHOWED OFF WHEN ON; OVER SPEED AURAL WARNING ON AT ANY SPEED. REMOVED AND REPLACED NR 1 DCU IAW AMM 31-41-04 OP/C GOOD ALL FAULTS AND CAUTION MESSAGES CLEARED.