Cable or transmitter problem?
 

I recently bought two of these cables:cgi.ebay.com/RC-USB-Flight-Simulator-FMS-Cable-Futaba-JR-ESKY-/180627319164

Unfortunately I cannot use my aileron channel. I don't know what is going wrong with it. The problem is only the aileron, other channels are ok... I have tested the transmitter in a real airmodel and it is working properly.

Any idea of what I could do to solve this issue?
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RE: Cable or transmitter problem?
 

Those are most likely the economy cables from a certain country in
the asiatic reason.
I had a similar problem.
Delicately you have to cleaan the pins with some fine sandpaper and try not to bend them.
It's what I did on mine and so far they have been working ok.
The pins are not as good as the ones on name brand JR or Futaba cables unfortunately.