The wire of the Cold Mirror fan is disconnected from the socket inside the fan compartment.

Remove the left cover of the projector, pull out the Cold Mirror fan assembly and check the connection of the wire at the left side of the fan (reference 1 image).

Plug of the rear fan units is disconnected from the Signal Backplane.

Remove the Light Source and Cathode Fan assembly. Check if the plug of the rear fan units is connected with the Signal Backplane (reference 2 image).

Blocked fan

Unblock the fan. Ensure that the fan can turn freely (reference 3 image).

Damaged wire

Check if the wire of the fan is not damaged (reference 4 image). Repair if possible, otherwise replace with new one. See service manual chapter "Replacement of the Cold Mirror fan".

Fan end of life

Replace the fan. See service manual chapter "Replacement of the Cold Mirror fan".

Malfunction Cinema Controller

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