As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2032. TRU 1 FAIL AT JET BRIDGE ON GPU DURING TAKEOFF ROLL. REJECTED TAKEOFF AT 65 KNOTS. REMOVED FROM SERVICE. FOUND TRU 1 SWITCH INADVERTENTLY SWITCHED TO THE "OFF" POSITION. PERFORMED DC ESSENTIAL GENERATION SYSTEM OPS TEST PER AMM TASK 24-31-00-710-801-A. NO FURTHER DEFECTS NOTED. RETURNED TO SERVICE.