The wire unit (reference C ) of the cathode fan (reference FC ) is disconnected.

Reconnect the wire unit of the cathode fan. The cathode fanis located between the lamp compartment and the Input & CommunicationUnit.

The wire unit (reference FC ) is disconnected from the Power Backplane.

Remove the Input & Communication unit and check if the wireunit is inserted in the Power Backplane.

Blocked fan.

Unblock the fan. Ensure the fan can turn freely.

Damaged wire unit of the fan.

Check if the wire unit of the fan is not damaged. Repair ifpossible, otherwise replace with new one.

Fan end of life.

Replace the fan.

Malfunction Fan Control Board

Replace the Fan Control Board.

Other fans are also not spinning.

Replace the SMPS Board.

Defect Power Backplane

Replace the Power Backplane.