I have two Lynx 3d radio that suffer from the same problem.
One if 75mhz the other is 29 mhz.
Both get no output to the servos... I have very limited radio get to switch around but its strange for both to have the same problem.
I live in Australia so support and spares arent the easiest to get. and the products (especially the 75meg) were purchased here.

Any advice would be great.

which modules & rx's are you using?

29mhz? do you mean 27mhz

We are using the modules and recievers that came with the radios.
and yes its a 29mhz . sorry

hmmm...
Not sure....

You by chance aren't using the 29Mhz Rx with 75MHz module?

Nope thats the first thing i checked. its just strange that its happened to both of them...
The display looks as it should but cant get esc or servos to work at all.
We are using different servos if that helps.

you are turing the radio's on and not just the display button?

have you tried using the DSC?

No i havent tried the DSC because i dont have the cable. If i did that would at least tell me if it was module or crystal related.

How do i turn the radio on as opposed to just the display???

Display button is located right below the LCD.

Power is located to the left of the wheel....

certainly the power switch. im 100% sure

It probably sounds silly, but make sure your servos are plugged in correctly? If I plug mine in backwards, they don't work at all, rather than run in reverse or something. It seems they'll go in both ways, unfortunately.

i have rechecked but and they appear to be correct.the servos are the original one either.
are all servos compatible???