On holiday then the disappointment, the third underwater session at Schnrocheln an OFF, no display, nothing was more. After careful rinsing with fresh water and a dry deck period then opening the camera ... not close. BATTERY removed, traces of oxidation.
Must dealers and the problem described, answer was that you can not return the item takes 28 days and not exchanges. Hoax? I'm curious ... have of course written back. :)