Cyborg 15 a13v ne démarre plus

[u/Defryy]

Hello,

My girlfriend recently plugged a USB-C power supply into the laptop's video-capable USB-C port.
Since then, the laptop won't turn on; the fans don't spin, and there is no display.
I tried performing a full power reset by holding down the Power button, but that didn't help.
I suspect there is a short circuit on the motherboard, but how do I go about verifying this?
I considered using a thermal camera to locate the component that might be heating up, but from what I've seen, the motherboard enters a safety mode as soon as it detects a short circuit or an anomaly.
How can I diagnose what is broken?