Boy - I hate to be giving advice here, I've only been into this hobby for a few months, hopefully if I'm wrong someone will save us both.

On my Futabas, on the front - in the lower left corner is a rectangular "button" with the controllers frequency on it - something like 72.370 which is channel 29. That button is actually the top of the crystal, and it can be lifted out with the fingernail of your thumb. When new, mine were lightly tacked in with soft glue. This is whatI was advised to take out, on the bottom are two pins which I will be careful to align correctly when I reinstall it.
Hey... hope this helps DickB