Terremoto won't run
 

Hey All. I have an off-road car but it's an electrical issue I need help with. I have a red at terremoto. It ran on 2s LiPo until the LiPo swelled. I recently got some 3s as an upgrade. Charged them and put them in now it turns. I hear the fans kick on. But it won't drive when I pull the trigger. There are no loose wires either.