I dont really know much about this stuff. But i built an arcade with a rasberry pi with retro pi. I have the ipac to and arcade buttons hooked up. retro pi would only detect player one and not the other player. So I thought i would try to upgrade the firmware on the ipac2. after i did that the computer shows that the ipac2 is plugged into it. but when i plug it in the raspi nothing happens and no lights light up on the ipac. hopefully i didnt mess it up to bad that i cant fix it. If someone can help that would be great. thanks