High End TrackSpot DMX Scanner Light Fixtures

We have 4 x High End TrackSpot DMX Scanner Intelligent lighting Fixtures.  When plugged in they all power up, however they don't seem to be functional and need repairs.  Repairs could be as simple as replacing a bulb, or they could be more involved.  The internals ( Stepper Motors, Mirrors, Optics ) all seem to be in excellent condition though they could use a cleaning.  These are being sold as is.