So I had the same problem. Yesterday it worked flawlessly today not at all. I was left with all of the menus showing but no image. Could mine be loose too? I watched the video. I saw where the sensor plugged in. So with my camera still assembled, I moved the screen to open. I pressed with my thumb a little to the left of the flower button on the back of the camera where the screen normally sits, and guess what? The screen flickered a little and then it showed what the lens was looking at! By flexing the back of the camera with my thumb I reseated the sensor connector.