Out of 1400 pictures 5 very important photos do not show on the photo frame but instead there is an queston mark in its place. I have read that it is because they were altered JPEGs, but i simply scanned them and did nothing else. What is weird is these photos are from the same batch and are all black and white.

Will this be sorted out if I change the file type to for example bmp?? Or do they need re-scanning (I hope not as haven't got a clue where the pictures are now)..