Hi

I recently bought 4 9202, GY 401 + 9253.

I connected my receviver to the gyro and servos on my table. The servos are not connected to any load. I was trying to see if all servos are working properly.

3 9202 servos and the 9253 servo were fine. There was something odd in the 4th 9202 servo.

I turned my Tx on and then my Rx on (9CHP + RD149). Immediately after the Rx was on, the 4th servo began making a sound as if its engine is working. The servo arm was not moving but the servo was shaking. After 2 seconds or so the servo was quiet again. The servo was connected to the throttle servo. When I move the throttle stick up the servo arm moved but the servo was making noise and shaking about two seconds after I stick movement was done.

I tried the same when this servo was connected to the elevator channel with the same results.

Is there something wrong with this servo?

Thanks,
Shanti