Wire unit (reference 2 image "ICP fan connection") disconnected from the Signal Backplane.

Remove the Card Cage cover from the projector and check if the wire unit (reference 2 image "ICP fan connection") is inserted in the Signal Backplane.

Blocked fan (reference 1 image "ICP fan connection").

Remove the Fan Control board and look inside the compartment to check if the fan is not blocked. Unblock the fan. Ensure that the fan can turn freely. See "Removing a board in the card cage".

Damaged wire unit.

Remove the Fan Control board and look inside the compartment to check the wire unit of the ICP fan. Repair if possible, otherwise replace with new one. See "Integrated cinema processor fan".

Malfunction Fan Control board.

Replace the Fan Control board. See "Removing a board in the card cage".

Fan end of life.

Replace the fan. See "Integrated cinema processor fan"..