I have a powermac g4 dual 500. When I bought it it said that that the usb was broken. But I plugged something in and it worked perfectly. The reason I think they said that was that that little like white thing in it (I think it holds the cord up) was gone. Does anyone know what that little white thing does? Or am I correct? ONE MORE QUESTION I'm selling it on ebay should I tell them that it's gone or not? CHEERS!