Blocked fan of the blue channel.

Check if the fan can turn freely.

The wire unit of the temperature sensor (NTC) of the DMD in the blue channel is disconnected from the Signal backplane.

Check if the wire unit (reference 3 image "DMD temperature sensor connections") of the temperature sensor (NTC) of the DMD in the blue channel is connected with the Signal backplane.

Defect temperature sensor which measures the temperature at the rear side of the DMD of the blue channel.

Replace the whole Light Processor Unit. Contact Barco for further instructions to repair the malfunction Light Processor Unit. It is too critical to replace this temperature sensor in the field. The replacement of this temperature sensor must be done at factory or at an authorized service center.