Carefully remove the back cover off of the camera by hand. Press the brown actuator in the FFC socket to release the FPC (Flexible Printed Circuit - brown cable attached to the back cover) and pull the FPC out of the socket.

If the FPC doesn't come out easily, you haven't yet released it. Do not force it. Do not use a spudger because it will break the socket. A broken socket cannot be fixed and has to be replaced by a skilled technician.