As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: REJECTED TAKEOFF AT APPROXIMATELY 30 KNOTS DUE TO TAKEOFF CONFIGURATION WARNING. RETURNED TO GATE. MAINTENANCE ACCOMPLISHED PSEU BITE TEST AND FOUND STAB TRIM NOT GREEN, INPUT FAULT. ACCOMPLISHED FIM 31-51-00-810-821 AND FAULT CLEARED.