As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOI FLIGHT NR 2406: AFTER START-UP, PROP DEICE LIGHT REMAINED ON (PROP DEICE SYSTEM INOP). MAINTENANCE FOUND NO FAULTS UPON INTERROGATION OF EMU, NO RECENT HISTORY OF PROP DEICE CAUTION. PERFORMED FUNCTIONAL TEST OF PROP DEICING SYSTEM PER Q400 AMM TASK 30-61-11-720-801. OPS CHECK GOOD. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.