USB Issue on AVR side. in Papilio DUO Posted February 17, 2015 · Report reply I appreciate the help. After watching the serial ports slowly go away over time, using Windows 7, I asked for a replacement board. Let me just state publicly that Gadget Factory, and Jack especially, have been wonderful to work with and helpful in any way they can be. I've been playing with the Papilio platform for a while, starting with a Papilio One 250 and gradually exploring the entire product line. This was a small hiccup, but nothing that would prevent me from ordering one of whatever Jack's next idea is.