The first start-up of the A / V add-on board gives me problems. When the usb cable is plugged into the usb socket of the pc, the red overload led lights up and the connection fails. When troubleshooting, I noticed that the VIO breaks down from 3.3 volts to 2.4 volts. The LDD jumper is inserted, the ACC jumper is not.
the DIP switches on the A / V board are set to audio. The same behavior also applies to another pc. I tested this because I thought my usb power might be too weak, which is not the case. what else can I do?
This problem is only with A/V board.