Hi,
I have a MB ASRock B450m pro4 and CPU AMD Ryzen 5 2600 and i was building a graduation project for my school, but some how 230 V AC got on USB power pin. I was using USB for programing purposes. It was total disaster for my project. Since this time, I can't start my PC. I also tested another PSU. GPU works, I tested it in my brother's computer. Do you think it's just a destroyed MB, or a destroyed cpu? Sorry for my English