Blocked fan of the Light Processor compartment.

Unblock the fan. Ensure that the fan can turn freely (reference 1 image).

Damaged wire of the fan of the Light Processor compartment.

Check if the wire unit of the fan is not damaged. Repair if possible, otherwise replace with new one (reference 5 image).

Fan end of life.

Replace the fan. See service manual chapter "Replacement of the fan of the Light Processor compartment ".

Malfunction Cinema Controller.

Replace the Cinema Control board. See service manual chapter "Replacement of the Cinema Controller".