As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AT POWER UP ON TAKEOFF, TAKEOFF WARNING HOLD AND TAKEOFF CONFIGURATION LIGHT ACTIVATED. CONFIRMATION WAS RECHECKED, ALL SETTINGS AS REQUIRED. REAPPLIED POWER AND WARNING CONTINUED TAKEOFF WAS DISCONTINUED. SPEED DID NOT EXCEED 5 KNOTS, FLAPS WERE SET AT ONE, TRIM AT 5.79 UNITS. REMOVED AND REPLACED FLAP/SLAT ELECTRONIC UNIT PER AMM 27-51-01.