Step 5 seems simple but it is critical. I had a lens problem but I had to detach the screen. I managed to put the camera back together alright but when I was done the camera would work but the screen wouldn't come on. I finally read the remark on this page about step number 5 so I opened the back up and used some tweezers to detach the ribbon cable that is connected to the dial panel. Then looked closely and reattached the ribbon cable in exactly the right place. That was it! When I turned the camera on the LCD screen turned on as well. Thank you so much.