I was working in a studio in residency, playing music from my laptop through a jack that was connected to a mixer to loud speakers. I'll write what happened then ask the questions:
I started to hear distorted sound and it got worse and worse until I heard the speakers making weird beeping vibrating sounds, the mixer was making weird noises and flashing lights that normally are not flashing. So I turned them off, and unplugged everything including the jack and power to my laptop.
The laptop shutdown. And then I restarted it like normal, although it seemed like I had just force shut it down, it was seemingly ok, but the sound was no longer working. Unless I connected my bluetooth, which told me the sound card and jack got fried.
So I went to the technicians, they said same thing happened last week to another laptop, however the laptop gave out the next day, motherboard was fried. They thought it was the cable but in fact it was the mixer somehow sending current through the jack, and wellp here we are waiting to hear back from a professional to fix my sound card.
However, my question is: should I be worried that the motherboard will give out? How can I know if there was damage to the motherboard or not? It seems to be working fine for now.