The Firewire cable is loose.ExplanationIn moving the computer, it is likely that one of the connectors on the Firewire cable came loose and is no longer properly seated.None of the other options would have been affected in just moving the computer. FireWire does not use IRQs for configuration. Simply moving the computer such a short distance would not require adding an external power supply if it wasn't needed before. Moving the computer does not change drivers used for devices.