The electronics of the Light Processor Unit remains off due to a low DMD temperature.

Make sure that the ambient temperature is within specs (higher then 10°C (50°F)). Let the projector acclimate. Do not start the light source, otherwise there is a risk for condensation.

Defect temperature sensor which measures the temperature 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.