I have tried to reply to a thread about this, but it wouldnt let me... but anyway, if this helps then here goes!!

Having just fixed a mates gimbal (Iv only got the FC40 ) I have found an interesting thing. It was beeping three times to begin with. all connections looked okay...

So i removed the first motor connection from the base of the gimbal and booted it. It beeped once.

reinstalled it, and removed the second connection down the line. Guess what, it beeped twice.

So reinstalled that, and unplugged the third connection on the back of the camera board. Three beeps.

After putting the thrid connection back in (what a fiddly job..) the gimbal was cured. Someone had attempted to replace the cable and had not seated the third connection properly.

But, I thought this sequence of beeps may be helpful for anyone needing to fault find!

Cheers
Will

Good info thanks