I have replaced the cracked stator and the shock abrorbers. Machine is level. It still won't spin for one minute without going bezerko and unbalanced. I popped the cabinet top open and supported it so I could try to spot a problem. It ran through a complete spin cycle with no problem. Snapped the top back down and in less than one minute it shook violently and went unbalanced. All of this while empty. What could the problem be?