Hi @attila,
Thanks for pointing out the relevant posts! I'm following this step by step now and would greatly appreciate your further guidance.
I checked the ferrites, they seem fine (FB18, FB19 both close to 0 Ohms when unplugged, Vbus at 5V, GND is at 0V).
I then checked the voltages. VPLL, VCCD, VPHY are all at 5V instead of 3.3V, so that's probably part of the problem. VCCORE and VCCA are at 1.8V.
Now, what are the next steps that I can do? I didn't quite understand the USB power control diagram below. Specifically, I didn't manage to locate IC21 (ADM1177) on the PCB board.
Thanks again for your help!