Ming, my ME did the same thing. I still don't know what caused it, or what made it stop. Only thing I can offer is to get into the power and re-seat the connectors going to the full-bridge rectifiers. You could have a loose wire that's making poor contact. Once the game warms up, the connector loosens more, causing the voltage to drop out to the logic board, throwing it into a reset loop. I was poking around with the rectifiers on mine when my table stopped freaking out.