Gerry Siegel (Honolulu) , Jan 23, 2006; 10:50 p.m.
In the event you may not have the manual, you might want to do the following, per pg 164, a long shot of course. Menu->Setup->All Reset-> See if it is still checked "Off". If the batteries are out for an hour it goes back to default settings per the manual. I see no reference to an internal battery anywhere, it might just have non volatile memory. I would avoid the surgery option. Never heard of this type of thing happening. Bad things happen to good cameras,Steve. Good luck. Hope it is a simple thing. Has been reliable for me.