How did you have your turbine setup in the radio, did you add ATV for failsafe... If you did, you had a lockout..

That said, there are two versions of 9000 in essence. the older ones didn't have fast re-acquisition. the only way to know is to cycle the power as in a brown out and see how long it takes to relink. If it takes less than 1 second, you have the latest software. If it takes 3 sec, send it in for updates. IF the light doesn't flash then, its the old Software..

with the 9000 make sure you are using both remotes, not one for a jet. cheap insurance.

The DX7 is a full range TX, no different than 9 or 12.. so its a receiver/install issue.

remember no system if bullet proof, but maybe that will help..