REMOVE THE BATTERY ... REMOVE THE BATTERY, PRESS THE POWER BUTTON 5 TIMES ... THIS REMOVES ANY RESIDUAL POWER IN THE CAMERA .... CLEAN THE ROTERY SWITCH (camera top right corner) WITH ISOPROPOL ALCOHOL ON A COTTON SWAB OR COTTON BALL ... DRIP SOME ALCOHOL INTO THE CREVICE BETWEEN THE ROTERY SWITCH AND THE CAMERA BODY, ROTATE THW SWITCH A DOZEN TIMES IN BOTH DIRECTIONS AND ALL WILL BE FINE ...