I have a canon sd750 camera, and lately, every once in a while, it won't show the picture I took. I could still see everything else, but instead of the picture I just take, I would see black screen. I can look at the pictures I took before, but not the one that I just take. It happens quite a few times now, the last time it happened, my sister pressed the power button and the picture came back. But this time it happened again, and the power button didn't work like last time. Does anyone know how to permanently fix this problem? Thank you. :D

Do you have the manual? As a power saving function a camera can be set to not sow the photo after it's taken

Yes I have the manual. Auto power down is off. Display off is at 20 seconds.

I can see the icons and all that, but the rest is pitch black. I cannot see anything. I can look at the pictures I took before, but not the one I am taking.