Fm radio

[Gee]

If you plugged a battery pack into the receiver and the servo worked then it doesn't sound like the receiver. You can check the esc's channel by plugging the steering servo into the esc channel and use the battery pack. If the servo moves when you use the throttle your receivers fine. Check the wires coming off the board on the MM. There's the two for the switch that can become loose and create problems.