Damaged insulation of the wire unit (reference C ) of the fan (reference F2 ) for the Input & Communication unit.The fan is located behind the high density dust filter at the frontof the projector.
Remove the high density filter at the front side of the projectorand check the insulation of the wire unit of the fan.
Repair the insulation of the wire unit using shrink sleeve.
If not repairable, replace the whole wire unit and/or fan.