All ports on Jetson Nano Carrier Board no longer work

I have an Nvidia Jetson Nano Module with a Seeed J101 Carrier Board and it has worked flawlessly until now. When I turn it on, the LED lights up and the fan starts spinning, but all the other ports don’t work anymore: USB doesn’t even deliver power, I don’t have a signal with HDMI, Ethernet doesn’t work either, not even the small LEDs on the port and the 2nd USB-C port (the other one is for power) doesn’t work like before either. The only thing that works is that the lsusb command prints “NVIDIA Corp. APX”. I don’t know that I’ve ever done anything that could damage it and with USB-C there won’t be any overvoltage, right? What else can I do?