What was found
LOW SPEED REJECTED TAKEOFF WAS AT 60-65KT ON TAKEOFF ROLL WHEN THE FO SIDE PFD STARTED FLICKERING CREW IMMEDIATELY REJECTED TAKEOFF AND RETURNED TO GATE. NO INJURIES AND AIRCRAFT WAS ABLE TO RETURN TO GATE UNDER OWN POWER. REJECTED TAKEOFF DUE TO COPILOT MFD/PFD FLICKERING WITH RED HDG FLAG POSTED. ALL INDICATIONS RETURNED NORMAL AFTER CLEARING RUNWAY. FOUND LOOSE HARDWARE ON K122 CROSS TIE CONTACTOR, TIGHTEN HARDWARE TO RIGHT DIMENSION IAW CRJ 700 AMM 24-63-07-400-801. PERFORMED OPS TEST, OPS TEST GOOD AT THIS TIME.