Yeah...have listened.....nothing.....checked the voltage across the caps.....nothing.....maybe current limiting resistor in the circuit that's blown but the circuit isn't easy to trace and no idea what the components on the board are supposed to be as many of them don't appear to have markings other than whats on the board such as C3 D7 U2 etc. One suspect chip is a monostable multivibrator which should be easy to find but the SCRs are impossible to identify as are most the diodes, resistors and caps. Only double sided board so not the nightmare of multilayer but still it's two small boards and it's fiddly tracing it through.