take away the cover from the display side. next to lower right corner of the display you'll see the the small motor and the plastic gear on its axe. turn this axe of this motor clockwise (or counterclockwise, don't remember now) until you feel it stops. The diameter of that gear was 2mm and it was white. Turn on the camera, it should work, if not then rotate that axe in different direction and turn on the camera again. It looks like that this problem occurs if you turn on the camera with battery depleted. Even if you recharge battery the problem persists and you’ll have to do what I described above.