What was found
(CAN) DURING TAKE-OFF ROLL, PILOT NOTICED THAT AUTO-FEATHER SYSTEM DID NOT ILLUMINATE TO IDENTIFY ARM FUNCTION. PILOT INITIATED REJECTED TAKE-OFF, ADVISED ATC & SUBSEQUENTLY RETURNED TO AIRPORT. MAINTENANCE WAS CONTACTED TO INSPECT AND TROUBLESHOOT AUTO FEATHER SYSTEM MALFUNCTION. WE WERE INFORMED BY THE AMO THAT THE MALFUNCTION OF THE AUTO FEATHER INDICATION SYSTEM WAS RECTIFIED BY THE REPLACEMENT OF THE PRINTED CIRCUIT BOARD NR 119 REFERENCED AS P/N 112-364021-5. AIRCRAFT RUNS WERE COMPLIED WITH AND THE AIRCRAFT WAS RETURNED TO SERVICE. THERE HAS BEEN NO REOCCURRENCE OF THIS DISCREPANCY.