When I turn on the power and clear the HHHH to 0000 to pass, the number 6907 appears and the camera will not do anything. I have replaced the batteries, new card and tried numerous times to get camera to work but nothing happens. if I place a card with pictures already on it the number 6911 appears. What to I need to do to get camera working. PS. The camera is not used enough to generate 6907 or 6911 pictures. Thank you for your time.