Put felt tip on the contacts, when you put the camera back on it should transfer onto the other contacts there might be one which only just touches.Steve Carr you were dead on. The camera gimbal stop / starts working when I jiggle the unit. Most notably is a landing from 6 inches when the camera gets a bumpy set down. Taking the drone and lifting 4 inches and then setting it down and the camera works.
Now the question is...Is it the connection between the camera and drone? (should I slightly bend the connection prong a little bit to make the higher and tighter fitting?) Or is it internal to the camera?
Thanks for your help