your 7805 or rectifier is broken I think, too. The black round thing (first part after j1) is the rectifier. 2 pins are input, 2 are output. Check the output voltage of it. Should be same as the input. Then it goes to your 7805 which makes 5V from it. The lower pin of the 7805 is input, the middle is ground and the upper one is your 5V output voltage. All the parts and 5V pins of the core are supplied from this pin. You can measure the resistance of your caps like this: very high or endless ===> ok .... low or no resistance ===> damaged. greetz