It seems like you plugged the USB2.0 cable into the wrong port. What is the make and model of the motherboard?
I have a micro usb i tried to connect st the back of my motherboard and still the sameSomething tells me you fried the AIO after forcefully plugging that USB connector onto a PWM fan header. Can you take the AIO over to another donor platform to see if it's the same story on the donor motherboard?