Your serial number in your sig suggests that you have a Rio unit and not an Empeg. With my Empeg, a few of the wires came loose of their crimp in the docking cage. It is my understanding that this issue has been fixed with the Rio units, but you never know.

Otherwise, If you are using the extension cable that came with the tuner, I remember seeing that some of those shipped wired improperly.

Good Luck.