Spektrum & Mamba Max problems.
 

I have a Mamba Max 5700 in a RC10T4. I just put in a 3000 Spektrum receiver last night that I acquired off of eBay. When I had it on the bench (with the Transmitter close to the truck) and started turning the steering wheel, the receiver & Mamba would start to blink sometimes & the steering servo would start to turn left & right in at the same timing as the blinking receiver. It would not do this all the time. Sometimes the motor would start to run also when the receiver would blink. I set up the Transmitter with the Mamba correctly before all of this. When I take the Transmitter away from the truck I could not make it do this. It ran way up the road and back & it did not do this. When I brought it back inside, I could make it do it again. My other pro 3001 setup in my 4WD buggy doesn't do this. It has a Sphere & Velociti 6.5 motor in it. The T4 did not do this with a cheap Futaba AM system in it either. Any opinions? Thanks.