Martin
I am currently not at home, away at our daughter’s, but I think your description of how you see your Orange Rx is correct.
With regard to a receiver, obviously a Spektrum original branded one should always work, but the cheapest is now c£30 or so.
If all else fails, then Al’s Hobbies are now the UK agent for Spektrum and offer a service facility I understand.
A couple of other thoughts:
The Tx and Rx actually will sometimes NOT bind if too close together on the bench. A metre or so apart is best, and the same applies when switching on at the pond side, that is assuming you have got it all working ok at home!
Batteries? If you have flashing lights on the Tx and Rx, then I would guess they are okay.
Finally, I stopped using the oblong orange receivers with a very short aerial (I only paid £4!) because they were/are park flyer, ie relatively short range. Currently I am using the orange 6 channel telemetry enabled receivers in two hulls because at £17.70 each from HobbyKing they are a third of the price of the genuine Spektrum version, one of which came with the Dx8 Tx, These Orange £17.70 receivers have two quite long aerials and are described as ‘full range’.
Very finally, my experience with r/c is that it is handy either to have two of everything, OR to have a friend with the same brand of system, because you can then compare the two to find the fault. For example, you currently don’t know for sure if the Tx or Rx is at fault, even though as you say, the Tx is making all the right light signals/noises and it is probably therefore a receiver problem.
Cheers for now – back to baby sittting…
Paul.