LPS communication cable disconnected from the CTLB-IN port of the LPS unit.

Check if the LPS communication cable (reference 3 of image) is connected with the CTLB-IN port of the LPS unit.

LPS communication cable disconnected form the Signal Backplane.

Check if the LPS communication cable (reference 6 of image) is connected with the Signal Backplane.

Malfunction of the LPS module. The red LED “ERR” of the LPS module lit up. See chapter "LPS module diagnostic LED's".

Replace the malfunction LPS unit. See service manual chapter "Lamp Power Supply (LPS)".

Malfunction Barco Cinema Controller board.

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