I have a Viper Marine 25A reversible ESC for a brushed DC motor. It worked fine until I went through the calibration routine. After that the ESC did not output any power to the motor. I could repeat the calibration routine and is went as specified in the manual, but the ESC no longer powers the motor. I have the same model ESC purchased last year and it does not have this problem. The motor is well matched to the ESC and the device never got hot. Has anyone had this problem? Can anyone suggest a fix?