The manufacturer of the camera is Olympus, It is a digital camera and has 6.0 megapixels. I hope you can sort it out.
Thank you for your proposal. I have done both the methods you suggested.
To play back from the memory card, I first get 3 pictures of me, which I did not knowingly take and then get back to the pictures I took.
Without the memory card I get only 3 pictures I took. They are not the same, ie. not the latest I took.
When I first removed the memory card with the camera switched off, the camera went on automatically. After removing the memory a number of times, it no longer did this and I am now able to get into playback mode. Hurrah !
Thank you for your suggestions, I conclude that question 1 has now been answered to my satisfaction. although I still do not know how the camera temporarely got into the state of not allowing me to get back to playback mode.
Could you now please answer my question 2.