Holding the camera upside down with the battery door open and the SD chip closest to you, the micro-switch is white. it is to the left of the SD card, immediately to the right of the black plastic protrusions which might act as a catch for the latching mechanism. We have 2 of these cameras. The one that is working has the white micro-switch which moves down when you push on it. The broken camera seems to be missing this white micro-switch, and it will not turn on. just now by Robyn Budenstein