Malfunction software.

Reboot the projector.

There is no ICP board installed.

Install an ICP board. See service manual chapter "Replacement of the ICP board".

ICP board is not correctly seated.

Reseat the ICP board. See service manual chapter "Replacement of the ICP board".

ICP board not correctly inserted.

Re-install the ICP board. See service manual chapter "Replacement of the ICP board".