I was flying my trex 450 pro today and something strange happened. I flew it until the battery got low and i put the heli up so i could run to the store for my wife real quick. When i got back i went and installed a charged pack and took it outside to fly again. When i hit the throttle the motor does not turn. Then i noticed that when i unplugged the battery and plugged it back in my ESC did not make any noise....No beeps like it normally does. I tried plugging the battery in with throttle all the way up to enter set up mode and it still wont make any noise.



All other functioins work normally.


Can anyone tell me what may have happened?

Is my ESC fried?


Please help.

When my ESCs do this, the first thing I check is to make sure I have continuity with an ohmmeter between all three connectors going to the motor.  The problem usually ends up being corrosion inside the bullets where the rosin flux is not completely washed away.  I have found it on the motor side and the ESC side.  While this is the most common problem, sometimes the ESC or motor winds up being fried.

Bryan

What is more likely to have gone bad ? The ESC or the motor ?

Unfortunatly I've had both go bad. It sounds like the ESC bit the dust. I had one on my Trex 250 go exactly the same way. CK both like suggested, but my money is on th esc.[&o]