Shutter button is stuck or jammed.
No idea about access to settings on that camera but can you access settings menu and do a factory reset?
Or perhaps remove the battery for say 30mins and see if that stops it's bad behaviour?
Can't get into the menu or anything. As soon as the camera is switched on it immediately starts taking photos.
Apparently by playing around with all buttons removing and re-inserting the battery, he can get it to stop. However as soon as it's switched off and back on again it starts constantly taking photos again.
It's still under warranty so he's ringing Fuji tomorrow and sending it back to them.
Nope shutter button still feels like it should. Very weird.
Might seem like it is but has something dropped down the little hole in the centre of the button. That's where you can screw an old style shutter release cable in.