Clean front and back + - terminals in camera careful with fine emery paper. Also, MAKE sure batteries are not loose if they are they will not make the connection. Fine jeweler screwdriver will pick them out enough.VERY CAREFUL.I truly think this is it.regards Billy
On an SD card there is a switch at the side which can be moved to protect the card contents (locked) or permit writing to the card (unlocked). Just move this to the unlocked position.
If these images have been locked via the camera menu system, just go to the relevant area and unprotect them,
the problem could be because of entering moisture, if so, open the cam, clean the main board and all connector terminals with cleaning liquid or CRC spray, then dry the circuit with dryer. clean the snap button and all the switches.