No communication with the Light Sensor Module (CLO).

1. Reboot the projector:

   1. Turn off the Lamp and cool down the Lamp for at least 1 minute if hot.

   2. Switch off the power of the unit and wait for at least 15 seconds.

   3. Switch on the power of the unit and respect normal startup procedure.

2. Check if the wire unit (reference 1 of image) is connected with the CLO module and with the Signal Backplane.

   Note: To access the Signal Backplane the top cover of the Card Cage has to be removed. Removing the top cover will lead to an authorization request upon startup.

3. If the problem remains, replace the CLO module. See service manual chapter "Replacement of the Light Sensor Module".