I need help with the repair of a Fujifilm digital camera. I fixed crook On/Off switch but stuffed the functions of the little "L" shaped board around the LCD screen at the bck of the camera.

My symptoms are that only the "Back" button on the rear of the camera works, all else have failed. The ribbon cable connecting the rear board to the main board appears okay and all the switches seem to be functioning (multimeter test) but no response from the camera. If you have any idea what it may be, please email me at keith@cashmasters.com.au Thanks in anticipation.