So, I started off hooking up a Actuonix Micro Linear Actuator to arduino uno.And powered the Actuator with external supply of ~5.5 V DC and 400 mA current. and the signal wire to the PWM pin on Arduino. The goal was simple and easy. It was to move the actuator lineally to a particular position and return. It did work and went on till a point where it abruptly stopped moving and there was no current being consumed. The insides are good and nothing seems to have burnt off or damaged. Please help me.