No pic, but sometimes the top of the cap will be "puffed up" (it should be flat). Also, if you look on the surface of the board around the cap, sometimes the coating will be dull (should be shiny), or it looks "crackly" and dried out (it should be smooth and have a "wet" look to it). Sometimes the leaking cap will also turn some of the solder joints around the cap a black color (they should all be silver).