I have a spektrum dx4r 3 brand new sr215 rx and an older sr410, everything was dead, like no power even directly plugging in a life 6.6 freshly charged pack I tried binding the 215, nothing every time I plug the battery and as good a tiny light flash inside the receiver now what the older 410 I rebound it and it powered up and operated fine I removed all the wires and went back to the 215 tried getting it to bind it just will not power up plug the wires back into the sr410 it was dead all over again I had to rebind it then it would work again and it works fine turning the switch on and off between the battery and the receiver it powers back up but if you remove the plugs it's all done it does not power back up until it gets rebound in the new receivers will not even power up to bind at all I'm at a loss here I cannot figure it out

I found out I was not binding my receivers properly but I figured it out and I'm all good thank you