There are no test points on the board to determine the condition of the board that I would be able to provide. However, I know you said it was set up for 220 volts (and excuse this question, but I have to ask), did you test this with a multimeter?

You can visually inspect the power board for signs of burns and swollen capacitors (tall cylinder components along the top left corner of the board), and check under the pcb for insects or reptiles (ants, lizards, snakes, etc).