My 200P was fine, then had a short in the torch/trigger switch. Then, when I turned it on, it went 'live' straight away-HF on, arc on, gas on. Trigger did nothing. Got gun fixed, and 2 relays and mosfets on HF board replaced. Now when I turn it on, the fan starts and digital readout lights up, but only for a second, then everythings dead. Cant find a service manual or wiring schematics ANYWHERE. Any help or suggestions very appreciated guys.