I seem to have buggered my speakers after moving stuff around. Oddly, the power supply is on, and music is coming from them, albeit at a low volume. But the volume doesn't go up or down ,and the thingymagic hand control that sits on the desk no longer has a light on. I've looked at windows settings and all seems okay. Any ideas? I've had to resort to xfm rather than iTunes - this is not making me happy.