Good evening chaps, I wonder if anyone has some advice? It concerns my Wolf Weld 200amp DC inverter welder that I purchased as a reader offer from The Daily telegraph about 10 years or so ago. It's been a great bit of kit, I hardly use it these days but it it brilliant with 4mm rods running at full chat for welding end plates onto RSJs. Anyway, it's started playing silly buggers, you can switch it on and you always hear the cooling fan spinning up but sometimes the output is zero. Switching it on and off repeatedly eventually seems to coax it into life, so then I leave it on until the job is done. Before I remove the casing, can anyone say what component I should be looking at as the culprit? I hope I can fix it as it is very good. TIA Julian.