Please help me here you experts! First outing with Emaxx with a 20T pinion on 2x2S Lipos...running fine on sand and then nothing: no drive forward or back. Servos fine, ESC light amber in neutral, green on acceleration and red on reverse but no beeps when I switched off and on? Has the ESC or motor blown or is this a protective shutdown? Have reset transmitter, checked all connectors to receiver and to motor. Noticed the ESC fan doesn't seem to come on and critically: no beeps when I turn ESC on...what to do???