you might need the drive-belt..but the repair itself is a serious endeavor. I recently bought the projector and the drive belt had come off the motor spindle. In the process of opening the projector the motor switch disassembled and while I could have repositioned the belt w/o opening the back, replacing it would require opening the back and the risk to several linkages and the switch mechanism makes this is very tricky proposition.
Bill
August 2009