Thanks. I had checked the batteries beforehand and they seemed to charge quick enough and repeatedly. But sure enough, when I dropped a fresh set in it cycles through and back the zoom settings as it should and I can only assume that the gear noise ( which still occurs )is exactly that as it resets to 24MM and needed the extra power to do so.
That will serve as my new test for battery strength.
Now if only I can figure out why I wasn't getting these replies sent to my e-mail?