lost my magnet and nothing works?

powertrek treadmill.lost my magnet on moving it to my home from my daughters ,and now i put another on it , and it shows all zeros, all over the place ,goes of then two zero;s flash at the top one on the right and one on the left of the screen,and nothing else .
the only nb i can find on the machine are as follows ,qcc 146,2455,0918,0026.no model nb or name just powertrek treadmill