MMM fault

Hi Folks ,

Jumped my monster the other day and after a few jumps the speed seemed to be slow...and it stuttered if i held full throttle from stationary.
Assumed it was a batteryprob but new ones were the same.
took it home and looked at it then the ESC wouldnt power the motor or beep at all.
Seems to arm ok according to the LEDs and ive tried re calibrating it and the TX to the Rx..steering works fine and ive tried a diff motor..ESC faulty ?