No communication with the Laser Control Board (LCB).

1. Reboot the projector:

   1. Turn off the Light Source and cool down the lasers for at least 1 minute if hot.

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

2. Check the cabling between the LCB and the Signal Backplane. Make sure the cable is properly plugged in.

   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 LCB. Refer to"Replacement of the Laser Control Board".

After checks are completed, switch on the power of the unit and respect normal startup procedure.