I am currently working on a MSI X470 Gaming Pro Carbon that has a weird issue: The board is working fine on startup, but after the BIOS initializes, the board shows "USB overcurrent detected" on the screen and shuts down after 15 seconds. The issue is only happening when the system is ready to boot.

What I have tried so far:
-optical inspection: no damages whatsoever
-BIOS update: The BIOS was updated to the latest stable version (I) using the CH341 1V8
-PM_OC: I checked every double mosfet (7002N) that is connected to that line. All the PM_OC-signals are...