I believe your mainboard has a short circuit.
I believe your mainboard has a short circuit.
I heard it, took it out, and checked it carefully—nothing there.
The issue appears to be internal within an SMD part. Based on the zapping noise and the fact that 12V isn’t safe, it seems unlikely anyone can fix it without advanced skills. Internal traces on the board are also beyond repair. Though the signs match others, arcing shorts probably weren’t involved.
Not 100% true since traces can be fixed BUT it does take experience with electronics to do that kind of work. Also note that applies only to traces that are easily exposed such as a circuit trace right beneath the PCB's external coating , for traces deep(er) into the PCB's layers it's not repairable at all. I too believe a component got popped such as a MOSFET for example, and if the board has a heatsink on those, the heatsink would need to be removed to find the damage. Then you'd have to hope the surrounding PCB surface isn't cooked like it is with alot of Gigabyte boards when they pop a MOSFET as an example due to the type MOSFET they tend to use. Even with that, you'd still need to know how to solder and have the equipment for the job just to do it. All this adds up to my initial assesment - Replace the board and be done with it.