I have a DSC-F717 which started this problem after formatting on a computer but I think that this was entirely coincidental as no other memory stick out of three would work either. I took the camera apart last night as there was no warranty left anyway. I found the memory stick contacts on the camera side to be dull and dirty as well as slightly "sprung". I cleaned them with a pencil eraser and gently positioned them so that better contact would be made with the memory stick. The camera began working again immediately upon putting it back together and so far, so good.

Reply