Lamp House is not correctly installed.

Check if the Lamp House is properly installed. Make sure that both fixation screws (reference 1 image) at the base of the Lamp House are fastened. See service manual chapter "Installation of the Lamp House".

Lamp Info Module with old firmware.

Check lamp info module firmware version in the "version info" area of the communicator. If mismatch is detected then run update. See "Software updates".

Malfunction Lamp Info Module.

Replace the Lamp Info Module. See "Replacement of the Lamp Info"