Spektrum DX6i, Repair, is it the servo or the radio? Or both?

In this video I discover two faults at the same time. Is it the radio or the servo, or is it both? This is a demonstration on how to check and correct the issue for free. I plugged the rudder servo lead in to the elevator port on the receiver. So, if you swap the servo leads over and you still get little movement, then it is most probable that the radio transmitter is at fault. This is how I corrected the fault.