Recently put together a spanky new XPC without problems. Tried to add a Dynex media card reader with no luck. Used the supplied internal usb converter and plugged the reader into the converter. All the wire colors matched up and everything I referenced the connections to, all looks correct. The problem......the green light on the reader stays on all of the time, like it is reading, even though it won't read anything I put in it. The green light even stays on when the unit is turned off. All reasonable suggestions appreciated. TIA Jim